I had something like that happen to me before...was this cute heavy-set white college boy I hooked up with. He made it clear he was straight but sometimes wanted to fuck guys. He was hot as fuck and who am I to judge. He was already pretty rough with me before we fucked and while the sex was hot it was also very rough and bordered on being non-consensual and too forceful at points. Once he'd cum inside me he started yelling at me about why I'd made him do it and that he wasn't like that. I thought it was some kind of role play but there was nothing I could say that would calm him down. I'm used to guys calling me a faggot and saying for me to say how bad I want their dick or cum, but he was slapping me and then started choking me. I forced him off me so I could get dressed and get out of there. He kept up the whole thing that he wasn't "like that" and not a fag but at the same time was trying to pull me into him and kiss me, alternating with begging me to stay and fuck him. It was like he was crazy or mentally unbalanced. I finally got my shoes on and fled his place, running to get back to my truck and get out of there. I blocked him on Grindr after that as I don't go for that kind of thing.
I had kind of the opposite thing happen with a guy I picked up and fucked. Again, a cute white guy who was really into me, got back to his place and we went it hot and heavy. He was begging for my dick and cum and barebacked him, cumming inside him as he begged for it. Then he started crying. Softly at first and then quickly hard heavy uncontrollable sobbing. I had no idea what was going on and tried to calm him down asking him what was wrong. Turned out he had a BF (we had fucked in their bed) and had thought about cheating on him but resisted it. He wanted to see how far he would go with a guy and admitted I was really his type and he wanted it bad, but realized he shouldn't have and couldn't undo it. He blamed it on being drunk, knew he shouldn't let me bareback him as he isn't on Prep and just felt stupid and shitty. I tried to hold him and tell him it was OK but he pretty much ordered me to get dressed and leave, which I did. I'm glad to hear other guys are having weird experiences like this too!