My ex was a HUGE cummer, that could often times shoot clear across a room. I felt him cum in me on only a handful of occasions, like actually felt the physical cum shooting in. Also I did (more frequently, but not always) feel the throbbing of his dick from cumming, both of these largely depended upon what position we were in.
So, I guess I'm a bit of an anomaly here, I've felt someone cumming in my ass, and holy shit it's mind blowingly fucking amazing. God dammit, I miss that sex. Now that I'm all riled up, I'll be back in a bit. I um, I, heard the dryer buzz.... Yeah, that's it.