Similar thing: I knew a guy that used to hit on girls by saying “I’ve got a cock that hangs 6 inches below my knee, want to see it?” If they said yes, then he would pull up his pant leg and reveal the tattoo of a rooster hung in a noose on his calf.

He was already a good looking guy, so I don’t think he needed the extra sauce, but I guess it doesn’t hurt to have a great opener like that