A bored martian couple goes out for an interplanetary spin, and they land their flying saucer in a field near a farmhouse. Inside, the farmer and his wife are just finishing supper. Hearing a strange noise, Bonnie looks out the window and sees the spacecraft.
"Clyde," she says, "we've got company."
At that moment, the door on the space ship opens on its own, and an extremely attractive couple walk out. The couple then walks into the kitchen.
"Sorry to disturb you," says the female martian. "My name is Maalox, and this is my husband, Exlax.
We live on Mars, and we've come to earth for the weekend. We've been watching the two of you for a long time, and, well, frankly, we've always wanted to meet you."
"Well, come on in," says Bonnie. "We don't get many visitors around here. Why don't you join us for coffee and cake?"
The two couples hit it off immediately, and eagerly exchange information about their respective planets. After two or three hours, Clyde, who can't stop looking at Maalox, invites the ET's to spend the night with them.
"We'd love to," says Maalox.
"Back on Mars, when people invite you to stay over, the custom is to exchange spouses for the night. WE find that this adds a little spice to that marriage." After a brief moment of hesitation, Bonnie and Clyde turn to each other and nod in agreement. So Bonnie takes Exlax into the bedroom, leaving Clyde and Maalox alone on the living room couch. A few minutes later, when Exlax undresses, Bonnie is somewhat disappointed to see that he is severely underendowed. Looking down at him, she says, "I don't mean to embarrass you, but exactly what were you hoping to do with THAT?"
"Let me show you," he says. "But first, you'll have to pinch my nose three times."
Bonnie does this, whereupon his member suddenly and dramaticaly expands into everything she had hoped for.... and more. The next morning, after their guests leave, Clyde and Bonnie can hardly wait to compare note.
"I loved it!" says Bonnie. "No offense, dear, but that was the best night I've had since our honeymoon. How did it go with Maalox?"
"Well," said Clyde, "not so great. She's a very beautiful woman, but darned if she didn't spend the whole night playing with my nose."