Here's a classic:
There was this businessman who was getting ready to go on a long business trip. He knew his wife was a flirtatious sort, so he thought he'd try to get her something to keep her occupied while he was gone, because he didn't much like the idea of her screwing someone else. So he went to a store that sold sex toys and started looking around. He thought about a life-sized sex doll, but that was too close to another man for him. He was browsing through the dildos, looking for something special to please his wife, and started talking to the old man behind the counter. He explained his situation.
The old man said, "Well, I don't really know of anything that will do the trick. We have vibrating dildos, special attachments, and so on, but I don't know of anything that will keep her occupied for weeks, except -- " and he stopped.
"Except what?" the man asked.
"Nothing, nothing."
"C'mon, tell me! I need something!"
"Well, sir, I don't usually mention this, but there is the 'voodoo dick.'"
"So what's up with this voodoo dick?" he asked.
The old man reached under the counter, and pulled out an old wooden box, carved with strange symbols. He opened it, and there lay a very ordinary-looking dildo. The businessman laughed, and said "Big deal. It looks like every other dildo in this shop!"
The old man replied, "But you haven't seen what it'll do yet." He pointed to a door and said "Voodoo dick, the door." The voodoo dick rose out of its box, darted over to the door, and started screwing the keyhole. The whole door shook with the vibrations, and a crack developed down the middle. Before the door could split, the old man said "Voodoo dick, get back in your box!" The voodoo dick stopped, floated back to the box and lay there quiescent once more.
"I'll take it!" said the businessman.
(1/2)