A couple from Mars landed on Earth and met an Earthling couple. Their conversation soon turned to the topic of sex. Both couples were interested in how the other couple "did it". They decided the best way to find out was to swap.

The Earth woman went off with the Martian man and they stripped down. She was surprised at how "small" he was. He said "Well, you have to knock on my forehead and it will get longer." She did, and it did indeed lengthen.

She remarked that it was much better now but still too thin and narrow. The Martian replied "If you pull on my ears it will get thicker." She did, it did, and they proceeded to have wild passionate sex.

Later when the Earth woman met up with her mate he asked her how it went. She answered "It was fantastic! Some of the very best sex I've ever had! How was it for you?"

He replied "It was awful! The damned bitch kept pounding on my forehead and pulling my ears!"