When satiating ones self and right at the time of climax. Let loose your human love juice into a sock, then put the sock into the freezer. Wait a few hours then right before your roommate somes home you put the sock in the microwave for about a minute or enough time to make it a hot sticky mess inside the sock. As soon as your roommate opens the door whip the sock right into their face.
So for my friends surprise, party right when he came in the door i generously gave him the Tuscan Whip.