But that doesn't mean one should have sex just to have sex. Only one of my partners has been a meaningless one night stand I wasn't even attracted to, every other one I've had some kind of feelings for.

I agree. I can't have sex with someone if I don't have a connection with that person.

And at the end of the day, the best part about sex is making your partner feel good.

That truly is the absolute best part of it. Getting an orgasm is easy, just use your hand. Giving an orgasm however, is so much more satisfying. Knowing what you're doing is really important. Otherwise you get into your head and struggle with insecurities instead of being in the moment. Or at least that's what I experienced when I was young.

They could be asexual as well.

That's not a choice.