OK...so this couple meets an alien couple from outer space. And they decide to swap partners for the evening. The Earth woman is with the alien man and he undresses and she notices his private is really, really small..........

She says to him, "that's really too small for me." The alien man begins to smack his forehead, and to her astonishment, his private begins to lengthen. He pulls on his ears and the private increases in girth. They make wild passionate love all evening.

In the morning, she meets up with her husband and she asks, "So, how did it go?" The husband says, "It was OK...I guess...she kept on smacking me in the forehead and pulling my ears."