Mine had to be a woman riding me reverse cowgirl, but she got really into it and I wasn’t feeling it.
I don’t know why I didn’t think to say anything, but I didn’t. Instead, I tried to get up (??) and as I tried to get up, I felt my dick bend.
LUCKILY nothing happened nor were there any serious injuries. But a genuine panic attack there. She felt it too and luckily we both had a time-out (as well as me being scolded for not communicating properly, which tbh 100% fair!)
Few years ago I hooked up with a FWB for a few months. It was pretty sweet until she broke the cardinal rule and crossed a line I was very strict about from day one: no hitting. She literally whipped me, with a whip! I gathered my shit immediately and left, never to talk to her again.