The Big Bag Theory has a few kinky moments, but nearly all of them involve Leonard and Penny - Never Sheldon. That soon changes in the episode The Fish Guts Displacement when Sheldon is required by the previously-mentioned "relationship agreement" to take care of Amy when she falls ill. Sheldon rubs ointment on her chest and even bathes her, leading to Amy pretending she is sick even after she recovers to continue scoring physical intimacy. Well, she is only human. Unfortunately, Sheldon finds out and decides he has to punish his girlfriend for lying and arrives at the conclusion that a good, old fashioned spanking is in order. Laugh out loud as Amy's eyes nearly pop out of her head at this suggestion. "You're not supposed to be enjoying this".