Honestly, I'm 22 and with experience so I'll say my opinion - the fun part about taking in a big dick is the foreplay. It turns into something incredibly hot and it takes trust ofc. So once you're both basically melting from it, you get so relaxed and ready, you want it so much ,you don't even feel the pain. Of course, it all depends on genetics aswell - not everyone has wide vaginas and anal entrances. But for me, it's rare but worth it
I'm being stupid but I can't enjoy sex scenes when the dick that's doing the dicking is too huge, all I end up thinking about is how painful that would actually be