You see, there was a time when a magician would have a lovely assistant. She'd look like she works off days at some Playboy men's club or some shit. Anyway, the act is this. You do your magic, and the lovely assistant bends over, ass to the crowd, and the taint part of her costume break away. The costume elastically retracts upward while she's still bend over. Then, she slowly pulls apart her ass cheeks.