There was this article on the news about the possibility of robot prostitutes in the future.. It was also discussed by Paul Verhoeven from Nerds of a Feather on Breakfast..

He cracked a joke about how you can tell the difference between a human hooker and a robot, when the robot vomits its blows sparks out its mouth..

Somewhat lame at the time.. but I thought it was hilarious because as soon as he mentioned sparks I thought of this:

Nunzilla