A guy was going on vacation and he didn't want his girl friend to have sex with any other guy while he was gone so the guy want to a porn shop and said to the assistant, "I need something to keep my girlfriend from having sex with another guy!"
So the assistant fetches a box and said, "This is a Voodoo Dick.  Here is an example of how it works," and the assistant said, "Voodoo Dick, the door!" and the dick went and fucked the door. Then the assistant explained, to return it to the box say 'voodoo dick your box.'"
So the guy hands it to his girlfriend and shows her how to use it but forgot tell her how to make it stop. The next morning, before she went to work she said, "Voodoo Dick, my pussy!" and it was the best sex she ever had, but she didn't know how to get it to stop.
So she went to work with it fucking her and while she was driving she had an orgasm and a cop pulled her over and asked why she was swerving all over.
She said, "I have a Voodoo Dick in my pussy and the cop shouts,
"Voodoo Dick, my ass!"