Gotta be careful though, some chicks are lunatics.
My friend's ex was a psycho and believed it was her right to "get every bit of semen out of him" or shit like that, swearing she would fuck him up if she found out he'd been releasing some pressure on his own, and she was the aggressive type who would come at you with a fucking fireaxe if in a passionate/rage mode.
Their relationship didn't last too long.