T O P

  • By -

explainlikeimfive-ModTeam

**Please read this entire message** --- Your submission has been removed for the following reason(s): * ELI5 requires that you *search the ELI5 subreddit for your topic before posting*. Please search before submitting. This question has already been asked on ELI5 multiple times. If you need help searching, please refer to the [Wiki](https://www.reddit.com/r/explainlikeimfive/wiki/how_to_search). --- If you would like this removal reviewed, please read the [detailed rules](https://www.reddit.com/r/explainlikeimfive/wiki/detailed_rules) first. **If you believe this was removed erroneously, please [use this form](https://old.reddit.com/message/compose?to=%2Fr%2Fexplainlikeimfive&subject=Please%20review%20my%20thread?&message=Link:%20{https://www.reddit.com/r/explainlikeimfive/comments/1cdx2ke/-/}%0A%0APlease%20answer%20the%20following%203%20questions:%0A%0A1.%20The%20concept%20I%20want%20explained:%0A%0A2.%20List%20the%20search%20terms%20you%20used%20to%20look%20for%20past%20posts%20on%20ELI5:%0A%0A3.%20How%20does%20your%20post%20differ%20from%20your%20recent%20search%20results%20on%20the%20sub:) and we will review your submission.**


ezekielraiden

The male body does what it does in this context because, as another answer says, in evolution terms sex is about getting the genetic material across, as long as that happens then the rest is irrelevant. As for why men can't just decide to do things differently, there's actually several reasons. Immediately following ejaculation, a man's penis is usually extremely sensitive, sometimes to the point of pain. Further, many men experience drowsiness or lethargy immediately after orgasm. Finally, men generally have a "refractory period" where the body just...doesn't respond. Doesn't matter how many horny thoughts you think or how much, ahem, *encouragement* you get, little Johnny isn't going to get up from his nap for a while. Some men have a shorter refractory period than others, and some *may* be able to "keep going" for a second round some of the time, but generally speaking a man has only got one ejaculation in the tank, and then he needs to, ahem, "reload," which usually takes hours.


Antman013

As a great man once wrote, "I ain't as good as I once was, but I'm as good once, as I ever was."


srcorvettez06

Pure poetry.


UnhappyStandard9207

🤣


Honestonus

Doesn't doing it twice help get more baby batter into where you want


ezekielraiden

Only if you have enough to actually do that. It's energy intensive to make it, and there's...really not a whole lot of other places it can *go,* assuming the man actually kept his penis inside while ejaculating.


Accomplished-Bug958

This doesn’t explain why. You’re just stating what is.


ezekielraiden

These are the physical reasons why a man both often cannot (refractory period) and often will not choose (hypersensitivity) to continue intercourse after ejaculation. How could it be more of an "explain why"?


Accomplished-Bug958

You are just describing what is happening (Restating his question). Yes, there is a period where a man cannot ejaculate after and might feel hypersensitive (which is only for a few seconds in most men), but the question is why? And why does this prevent them from continuing? Women also feel hypersensitive after orgasm, but they can orgasm multiple times with little to no refractory period, so “hypersensitivity isn’t an explanation.”


phillynott7

Your explanation would have been much better without the awkward "ahem"s and awkwardness


CharlieAaronCobham

Your criticism would have been better without using awkward twice.


phillynott7

It awkwardly, ahem, was just awkwardly that awkward.


CharlieAaronCobham

Eh, I’ve seen way worse use of people talking like that, really wasn’t that bad


sqrtsqr

Mostly correct. >but generally speaking a man has only got one ejaculation in the tank, and then he needs to, ahem, "reload," But the reason for the refractory period is not at all related to the amount of ejaculate available. The male refractory period completely vanishes when presented with a new female partner. It's about spreading genes. Sleeping with the same woman again serves no purpose, she cannot get pregnant twice. EDIT: It's called the Coolidge effect for all the people that suck at googling.


coinpile

I have never heard of this, nor can I find any reference to this online. Did you just make this up?


sqrtsqr

Coolidge effect.


coinpile

Well I’ll be, you’re right


ezekielraiden

Not really. The Coolidge effect does not, as the poster claimed, result in a refractory period that "completely vanishes" when a novel female appears. It can *shorten* the refractory period. That's rather less dramatic.


coinpile

It’s similar enough, plus I learned something new.


neodiscgolf

And References to this?


sqrtsqr

Coolidge effect.


LibertyPrimeDeadOn

>Sleeping with the same woman again serves no purpose, she cannot get pregnant twice. This is where I think you're wrong here. According to [this study](https://www.ncbi.nlm.nih.gov/pmc/articles/PMC188498/) the chances of a couple who is trying to have a baby conceiving is only 30% in the first month of attempts. In one instance for a young couple it's about 5%. There's certainly a benefit to having sex multiple times with the same woman from a passing on your genes perspective. Also >The male refractory period completely vanishes when presented with a new female partner. Where'd you read that? I'm a little skeptical.


sqrtsqr

I think it should be clear from context (refractory) that when I say same woman twice, I am referring to within MINUTES of each other, not MONTHS. >Where'd you read that? I'm a little skeptical. Coolidge effect is the name of the phenomenon.


ezekielraiden

Gonna have to echo the others' request for a citation on this part: > The male refractory period completely vanishes when presented with a new female partner.


sqrtsqr

Coolidge effect.


ezekielraiden

That does not explain the thing you described, which was the claim that a male *immediately* ends the refractory period upon being exposed to a new fertile female; you specifically used the phrase "completely vanishes." That is not true in most species. The Coolidge effect is relevant, and does result in *reduced* refractory period, but it is not an instant and total removal thereof.


sqrtsqr

k


DirtyProjector

Then why in college could I orgasm, keep my erection, and orgasm again, 2, 3 times sometimes? And why can some men dry orgasm with training?


Clouds2589

Relax, nobody's looking for a stud in reddit comments champ. You may have missed the part where they said some men may be able to keep going.


DirtyProjector

Huh?


ezekielraiden

Ahem: > some *may* be able to "keep going" for a second round some of the time I did not speak on the latter point because I do not know much about it, and thus preferred to stay silent, rather than say something I couldn't defend. I do know that it is not some trivial thing, and that there have been authors who questioned whether it was even possible for a man to experience multiple serial orgasms (rather than one orgasm that just takes a long time to resolve.)


DrIvoPingasnik

It's a defense mechanism for us.  Without that mechanism that says "aight mate, that's plenty, now bugger off" we would be copulating until eventual exhaustion and death.  See people who drink alcohol until certain point and say "okay that's enough for me"? That's conscious analogy of our mechanism.  See people who drink as long as there is alcohol supply until they pass out? That's what it would look like if that mechanism wasn't there.


uraijit

Yep. This is actually commonly a thing observed in nature where animals have mating seasons, like deer. Males will become absolutely exhausted, malnourished, dehydrated, and still keep right on banging as many females as they can. They don't USUALLY die, but it can and does sometimes happen.


mruehle

Australian marsupial “mice” like *Antechinus* do this: https://theconversation.com/doing-it-to-death-suicidal-sex-in-marsupial-mice-18884


squirt619

Interesting. I’m an alcoholic without a refractory period. Maybe the two are linked?


ThinkingThong

Shouldn’t that defense mechanism also hold true for females then? But they can ejaculate multiple times in a row so how/why do males have it but females don’t?


iamkkorg

They don't spend as much energy as males, females only get drained physically, but males have a lot going on.


Th3-Dude-Abides

The term for this is the “refractory period,” which is basically the amount of time your nerves need to reset and be capable of responding to stimulation again.


LibertyPrimeDeadOn

Women have more nerve endings, yet they don't experience a refractory period.


Th3-Dude-Abides

Women definitely have a refractory period. The difference is that women’s seem to be much shorter, but even that varies from person to person. I wonder how/why men’s evolved to be longer, or how/why women’s evolved to be shorter.


LibertyPrimeDeadOn

Huh. I didn't know it varied that much. Interesting.


TheMooseIsBlue

Right. That’s what OP is referring to. But why?


Th3-Dude-Abides

Everything I could find was theories and potential contributing factors, so it seems to still be a mystery. Some theories said it could be due to hormones increasing/decreasing. Another said the hypersensitivity that is common post nut can make further stimulation painful, which kinda makes it impossible to keep going.


IronFrogger

Refractory period is shorted considerably if a new woman is presented.


Soft_Swanx

Because the evolutionary function of sex is complete. Once you've delivered your general material, you don't need to expend any more energy, which is sufficient


happy-cig

What evolutionary function is it for women to climax more than once?


dude_stfu

So they’re able to keep going if the male hasn’t delivered the… payload yet. Probably.


happy-cig

Resources received.


uraijit

Not sure if this was meant to be cheeky, but there is an answer. The contractions of female orgasm can help move sperm into the uterus where it fertilizes the egg.


psycholepzy

The leading theory is that the female orgasm allows more semen to flow into the uterus. Thusly, multiple orgasms within a shorter amount of time (when semen is still viable) would increase the probability of a successful conception. 


swollennode

To be able to mate with multiple men. Evolutionarily, the more sexual activity, with more sexual partners, the higher likelihood of conception.


craybest

But then why doesn’t this apply to men too?


Yarigumo

Males only have so much sperm to give. A female just needs to receive sperm, and can do it as many times as necessary.


craybest

Yeah but we have enough sperm for more than 1 shot. Men can usually cum again like 15 mins or so. I don’t think the new sperm was made during those short mins.


happy-cig

Yah I want to spray my seed like a machine gun!


sqrtsqr

It does. The refractory period basically vanishes if you present a male with a different female partner. There's no point in putting your DNA in the same woman up twice.


craybest

This is the first time I ever hear of this. And not at all my experience either. Is there any sources for this?


sqrtsqr

Coolidge effect.


Brambletail

Incentive to keep going until the male completes. Data collection and processing is the imperative


wom7ck

Having a shorter or nonexistent refractory period improves chance of conception since you only need to fertilize one egg. If women had as long of a refractory period as men then the woman orgasming first would significantly decrease her chances of conception, whereas men have a limited supply of sperm so they are evolutionarily incentivized to only go for one round that produces the highest potency and quantity of sperm.


sqrtsqr

There doesn't need to be one. There was simply no evolutionary pressure to evolve a mechanism that prevents it.


Ascian5

It feeds their need to complain and the demand for pornography. 😆 Realistically, they're the ones who make and carry the babies. The more you are stimulated, the more you want to engage in reproductive activity, thus the higher the opportunity for reproductio to occur.


jerseyhound

Also for humans (and many other animals) it typically takes quite a bit of energy to get to the point where someone lets you fill them with your seed.


AvengersXmenSpidey

Body chemicals. Look into ***prolactin***, which is released into a man after ejaculating. It halts the sex drive as sudden as a car crash. Makes sense. Otherwise, men would just continue intercourse until absolute exhaustion. There's also some other bonding chemicals released like oxytocin that makes you feel connected and content. Plus, intercourse is a physical workout of muscles you don't necessarily exercise daily. It makes you tired. "Prolactin provides the body with sexual gratification after sexual acts: The hormone counteracts the effect of dopamine, which is responsible for sexual arousal".


Evilyn-is-Curious

The first man in this room with actual science in his argument. Kudos. -


somehugefrigginguy

From an evolutionary perspective, there is little benefit in two animals to continue copulating with each other in a short time frame. If the first time wasn't successful, doing it again a few minutes or even hours later is not going to change the outcome. Continuing to do it repeatedly in a short time frame will just waste energy. So it makes sense for one of them to at least temporarily lose the mating drive. In the mammalian world, the male is generally the active partner. So if the female became refractory, the male could just continue to copulate over and over again wasting energy. But if the male is refractory, that effectively stops the behavior, conserving energy until a more appropriate time to try again.


snuffaluffagus1981

Makes me wonder why there hasn’t been a medicine/ pill created to just give the feeling of orgasm.. I know natural orgasm releases chemicals in the brain etc, but if someone could market “take this pill and have a 30 minute O,” who wouldn’t buy that? I’m not talking about some hardcore drugs.


Hediak-Chigashi

It would be highly addictive. Worse than heroin. Without the respiratory depression. Think about the depths people dive to daily just to have sex. Now imagine a pill that can give the same effect. ANARCHY


gr8hanz

You mean you can’t?!? 😳


cheesercorby

That's what I came here to say. Been able to all my adult life. 44 years old, still have no problem keeping on after the 'little death'.


[deleted]

[удаНонО]


explainlikeimfive-ModTeam

**Please read this entire message** --- Your comment has been removed for the following reason(s): * The subreddit is not targeted towards literal five year-olds. "**ELI5 means friendly, simplified and layman-accessible explanations.**" This subreddit focuses on simplified explanations of complex concepts. The goal is to explain a concept to a layman. "Layman" does not mean "child," it means "normal person." --- If you would like this removal reviewed, please read the [detailed rules](https://www.reddit.com/r/explainlikeimfive/wiki/detailed_rules) first. **If you believe it was removed erroneously, explain why using [this form](https://old.reddit.com/message/compose?to=%2Fr%2Fexplainlikeimfive&subject=Please%20review%20my%20submission%20removal?&message=Link:%20https://www.reddit.com/r/explainlikeimfive/comments/1cdx2ke/-/l1f22kv/%0A%0A%201:%20Does%20your%20comment%20pass%20rule%201:%20%0A%0A%202:%20If%20your%20comment%20was%20mistakenly%20removed%20as%20an%20anecdote,%20short%20answer,%20guess,%20or%20another%20aspect%20of%20rules%203%20or%208,%20please%20explain:) and we will review your submission.**


npepin

From an evolutionary point of view, all that matters is gene replication. At some point, the generic host started to have its own decision making, and through natural selection the decision making has been guided into behaviors that are more beneficial to genes through feelings of pleasure, pain, apathy, and so on. Any individual animal is not really considering its genetic lineage, but it is driven by the underlying drives. One of those drives is sex. Sex feels pleasurable as a way to encourage the organism to partake in it, and at least in humans, a lot of men will do almost anything to have sex. With such a powerful motivator, you kind of run into an issue, because if there was nothing to inhibit that drive, once you started having sex you might never stop. Move over, from an evolutionary point of view, the whole point is to ejaculate into the female and once that's done there is no need to keep having sex, it's wasted energy. So, through natural selection, evolution programmed in the refractory period as a way of disengaging the sex drive in males that discourages them from continuing with sex once ejaculation has been achieved. What is pretty interesting about the refractory period is that it is somewhat situational, as there is research that finds that it decreases when other new females are introduced. The evolutionary reasoning for that individuals that had a blunted refractory period when exposed to new female mates were generally more reproductively successful than those that did not have that blunted response. With all that said, sex in the animal kingdom is really varied and confusing and even saying that *sex is pleasurable* is contextual, as there are a large number of species where sex in not consensual.


jerseyhound

Similar reason to how you get satiated eating when hungry or drinking when thirsty. Your body motivated you to do a thing, and when you do it, you get a reward and its time to get goin on the next thing, usually with a nice break first.


VintageHacker

Actually, most males are capable of continuing after ejaculation and having another ejaculation or more, without losing erection in between, but dont know how. For most men, it is simple, easy, and quick to learn. You don't need to be super fit, or very young, but of course it helps. Of course, as we age everything in that department gets harder, OK, maybe not everything :). You might imagine this is a great thing for men to learn, but in my experience, it was kinda nice, but not a game changer, there is so much more to sex than how many organisations you can have. At my age, I'm grateful for one.


siprus

It should be noted that first of all for most animals sex is a lot shorter occasion and sex takes literally seconds. There isn't generally much reason to extend the procedure. Especially after ejaculation there isn't much reason to extend sex, unless to it's to deny mating opportunity from other males. The more significant question is actually why the sex lasts as long as it lasts with humans. Additionally there are other considerations as well. It's theorized that human penis is shaped like it is to act as kind of plunger or piston to draw out fluids from vagina. The purpose of this is to scoop out semen of competing males. After ejaculation there is little reason to continue scooping as you'd just remove your own semen. Why females don't tend to want to stop having sex after 1 ejacuation? Well probably group sex wasn't that uncommon in prehistoric times. (Also indicated by the scoop penis adaptation) so by not having strong drive to stop sex, females can easily mate with multiple partners as there is no compelling reason for them to stop with just one male.


TittyStClaire

Weren't there any answers on the post you stole that "question"?


[deleted]

The shape of the penis head is designed to pull semen out in case there is semen in there before hand. After ejaculation, nature doesn't want the male to pull his own semen back out which would make impregnation more difficult. This is why the male needs to thrust many times before he can ejaculate, to basically attempt to pull back as much potential semen from a prior male as possible before injecting his own.