Big Bang - Penny's Facial

Penny and her boyfriend Steven are hanging out on the couch, but they can't take it any further because Penny has invited Sheldon over. Sheldon thinks that he and Penny are going to study together, but Penny intends to just copy Sheldon's assignment. When Sheldon refuses to just show Penny his assignment, Penny distracts him by flashing her tits. Frustrated, Penny pulls out Sheldon's dick and starts sucking. That, finally, gets Sheldon's attention off their assignment.