Yeah, I'm the same exact way. I've had casual sex a few times, and felt repulsed and depressed to an extreme degree for the next few days after.
It bothers me greatly and the memories of the casual sex alone freaking kill me when they surface.
It doesn't help that I'm a college drop-out, have no family around, and most of my friends are distant now. And single. And don't know to meet people.
Fuck I need to figure out a hobby that involves interacting with other people.
Actually, I think that'll be my next ask reddit/yc posts.
Maybe a targeted question like that will work.
Either way, yeah, I'm the same way. I have to at least care about her to enjoy it at all. Interestingly, the girl I enjoyed sex with the most, was a virgin when we started dating. The reason she was so good was her enthusiasm and that she displayed how much she cared for me even in bed.
It just magnified the quality of the whole experience.
Hrm. Nostalgia is killing me. I'd better slough off to bed.
Good luck in sharing this weakness we both seem to have.
Cheers mate.