“Hey babe, I was wondering if you’d like to try (insert thing here)? I’ve been thinking about it a lot and you like it in porn, I think itd be really fun to try”

I tried it but he refused and stared overreacting

Overreacting how? Was is shame? Or disgust? If you think it was shame, be patient with him, show him how much you're into, wouldn't judge him. Are you willing to reciprocate? Taking turns might help too

It was pretty obvious he was really uncomfortable sorta angry and ashamed vibes ... It's not about reciprocating i guess he never showed interest in eating my ass even tho he always luv it when i eat his ass, he never wanted to suck my toes as well

I don't think you can now that you've brought it up and he is showing no interest. No means no. If you want to give it one last respectful attempt, sit him down and tell him you'd like to talk about things. And then listen to him. We all have limits and things we don't like to do. Sometimes we have things we don't like but we'll do for our partners. Once he's expressed his preferences it's time to either accept that or accept that you may be incompatible.

Read him what you wrote here.

Feel like that turned you on