This is rare, but can happen if your not carefull. This is when a girl has some dude cum on her tits and you go in for the MotorBoat. You come up with a face full on cum. Kinda looks like there is water in the oil since its so white. Oh wait a sec it's cum on your face dumb shit.
No! Don't do it bro, he just put a big load on her.....damn! to late, he just had a Motorboat Leak.