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
I had a black gf that would sit on my cock and work her pussy muscles until I blew my load. Awesome feeling. She could lock down so hard it was amazing. After I came she would keep milking me until I was rock hard again for a long fuck session. Loved that gal. Loved her pussy.
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.