Do you want to pull the greatest prank on your friends. Use this informational poster to perform the best prank since the upper decker. Dick Knobbing has a long and storied tradition dating back to the emergence of doors with knobs in the 18th century. Rob revitalized the trend with this comic and dick knobbing has come back in a big way. This poster shows all the ins and outs of putting a dick in a door, as well as giving helpful advice for the first time prankster.