Why can a guy act like a total jerk after you hooked up?

[Anonymous]

I hooked up with my crush who always said I'm a friend and introduced everyone to me as his friend, after we hooked up its like he does not want to see me ever again. I showed up and surprised him at a bar and he was nice but I could tell he did not want to see me. Now he's acting shady and ghosting me. but I've been super nice to him. Why do some guys act like a jerk after a hookup?

[RuthlessAggression]

You're not a "friend", if you were crushing on him. And you're def. not a friend now that you've had sex.

I don't understand the hook up culture. It's silly to me

He likely acted like a jerk because he "got what he wanted", right?

[Guy13]

A woman connects emotionally before sex and sex seals the deal. Woman seeks committed relationship as bond has been established UNLESS body count is so high that sex has no effect.