to Foxlin :Yes! And this is why all tops or vers tops should experience a bareback orgasm at LEAST once in their life! Because the "taint" or perineum/lower abdominal muscle is constantly flexing, even when we're not aware of it! When we piss, fart, whatever the case may be. That's the "core" muscle. I've actually let a couple guys cum in my ass for the first time, and I also came at the same time, and they all said it was "mind-blowing" and "unexpectedly intense". It's SOOO tight when the bottom cums and clenches to the dick!