If you're craving a quick-but-stimulating break from intercourse, this move is the perfect titillating timeout. To do it, the man withdraws and rests the tip of his penis on the clitoris. Then, hold the base of the penis and shake it quickly from side to side so that the head hits the clitoris with every wiggle. In doing so, you'll be stimulating both heads at once -- that of the clitoris and the penis -- which should send you both into paroxysms of pleasure.