When a man, nude, between two females, as he is fingering both of them, one of them has a hand on his balls and the other is jerking his penis vigorously until they all get off.
Looks like a triple piston kind of night.
When she bounces on your little weenie while you thrust up.
Three more Piston pushes babe.
Dude I heard that kevin gave her that Virgin Piston
I was playing COD last night and piston raped the enemies
Can only be done in cold climates. When you are having sex or masturbating and when you are about to bust you run outside and stick your penis the snow.
I tried a seized piston last week
A group sex act in which three people who possess phalluses simultaneously penetrate the orifices of one other person.
Three members of the college football team showed the Captain of the cheer leading squad how a three piston engine worked.