Ben asks his new girlfriend for a hand job.
“I’ve never done that” she says, “What do I do ?”
“Well” replies Ben, “Do you remember when you were a kid and you’d shake a coke bottle and spray your brother with it … That’s what you do. “
She nods, so he pulls his manhood out and she grabs hold of it and starts shaking it.
Some time later, he has tears running down his face, snot flowing from his nose and wax flying from his ears.
She asks ‘What’s wrong ?’
Ben shouts “Take Your Fucking Thumb Off The End!”
This joke is included in the Black Book of Jokes. You can order it from here.