A couple from earth has finally saved up enough money to take a vacation on mars (they could do that then). So they go to mars and meet a martain couple and start talking about they way they do things and come to the subject of sex. They decide to switch partners for the night to see what happens.

The human woman and the man martain go into a room and the martain strips but his thing is the size of a pencil (whoa), and the woman says, “um, how is this going to work?”
The martain man replies “Oh, not big enough? Okay then.”

All of a sudden he starts slapping his forehead and his thing grows longer. “Um, that’s good but isn’t it still a little thin?
“No problem” the martain man replies.
Then he starts pulling his ears and it grows wider.
The woman is amazed by this and they have wonderful sex.

The next day they meet and the human man asks his wife how it was and she said “Oh my, it was wonderful! How was your night?”

The man replied, “It was awful!!
The martain woman kept slapping my forehead and puling my ears!”