I had a AP who'd reverse cowgirl and pulsate her pussy around my cock then turning back at me to give me a cheeky wink then continue dropping her luffy dough on me, I was gone in 60 seconds
I have only known one woman who could do that really well...the first time we had sex she literally pushed me out of her and she promised she didn't mean to...she hadn't had it in a long time. you're right though...its phenomenal when done right
We call it a muscle fuck. I had two women in my life that could do that, to a limited degree. The most pleasurable sex a man can have. I had one woman orgasm and actually trap my dick in her. Double pop for me. :)