Quickly you pull down your pants and you see something is moving under your shorts. It seems yo me getting longer by the second untill it reaches the bottom of the right leg of your underwear. You have to see what it so you pull you boxers down to your knees. Your eyes grow wide at hat you see. It looks like you have a tail. I'm dreaming, you think, I have to be dreaming. But when you pinch the thing a sharp pain shoots up your back and the tail jumps out of your hand. The tail has already grown to a legnth of almost a foot now and you find that you can move it. Your eyes go wide again as a dolphin-like fluke grows out of the end of the tail.