Alien Ears
Farmer has a space ship land on his property and aliens get out. They say they are stuck and can't leave until the next day. The farmer invites the alien and his wife to stay as their guests for the night. Alien says thanks but the custom where they come from is to have guests exchange wives. Farmer says OK and asks his wife, who also agrees.
That night the wife is in bed with the alien, when he gets undressed and into bed, she looks at his penis and tells mim that it looks pretty tiny. He says, "no problem," and pulls on his ear. The penis gets longer. She looks at it again and says that it's pretty skinny. Again, he pulls on his ear and it gets fatter. She enjoys the rest of the night.
The next morning, after the aliens leave, she tells her husband how enjoyable the night had been. He says, "It was lousy for me. She kept pulling on my ears all night."
Joke 7