Why do men get mad when you suddenly stop giving them pussy without notice?

Why do men get mad when you suddenly stop giving them pussy with no notice, but you are not in a relationship with this man?

What if I don’t like it? Am I required to continue to have sex with someone that doesn’t satisfy me? Sex is a two way street. Unless you are paying for sex, it can be a one way street.. I don’t care if a man gets mad that I no longer want to have sex with him.

However, it’s interesting that men get in their feelings about it knowing you are not together and he is not paying to play. So there is no obligation. And even if we were together.. am I obligated to give it up?