There is absolutely no comparison. When you masturbate and can't get your hand around your penis, it is an AWESOME feeling. When you are having sex and are really reaming a pussy out with your big cock and she is responding to every little move that you make... is a GREAT feeling. Watching a woman totally relax, reduce herself to her basal personality and cut all of the bullshit because she wants your cock so bad is an AMAZING feeling. I highly recommend PE, although I like the extreme results I get from pumping. Penetration is a bitch when you have this big assed swollen cock that just can't fit in a tight hole though, I still wouldn't trade it for the "easy" penetration days from my youth.