A young woman buys a mirror at an antique shop, and hangs it on her bathroom door. One evening, while getting undressed, she playfully says "Mirror, mirror, on my door, make my bust-line forty four". Instantly, there is a brilliant flash of light, and her boobs grow to enormous proportions.

Excitedly, she runs to tell her husband what has happened, and in minutes they both return.

This time the husband crosses his fingers and says: "Mirror mirror on the door, make my "manhood" touch the floor!".
Again, there's a bright flash and both his legs fall off.

That is STELLER