The Big Bang Theory – Sheldon Trains Penny


Season 03 Episode 03, “The Gothowitz Deviation “

At the apartment, they are watching anime as Penny tells the story of her friend Anna Mae Fletcher. She realizes she is talking too much and gets another chocolate from Sheldon. Then she takes a phone call out in the hallway with Sheldon rewarding her gain. Leonard has had enough. He knows that Sheldon is use chocolate as a positive reinforcement for what you consider correct behavior. Leonard tells him to stop developing his girlfriend like a lab rat. Sheldon squirts him and tells him” Bad Leonard .”