A woman out shopping sees a counter marked "Sex Frogs," and goes to check it out. She asks the man behind the counter, "What's this?"

He replies, "Oh these are going very well. You buy a frog and take it home in a box, and when you are ready for bed, you put the frog on your pillow, and we guarantee that you will have the best night ever."

The woman whispers to him, "Okay then, I'll take one."

He puts a frog into a box, and points out the label with the instructions. "If you have any problems, there is a help line phone number on the box."

That night, she gets ready for bed, puts the frog on her pillow, and gets into bed. Nothing happens.

She feels so disappointed that she gets up and checks the box. It says: In case of any complaint, please phone this number." She phones the number and 10 minutes later, a man appears at her door.

"Show me where the frog is," he says.

She takes him upstairs and points to the frog, still sitting on her pillow. The man picks up the frog and says, "Okay, I'm only going to show you how to do this one more time."