The Tangible Affection Proof
S6, E16: The couples are getting ready for Valentine's Day: Leonard, Penny, Howard and Bernadette are going to dinner, and Sheldon and Amy are trying to get the perfect gifts for each other.

S6, E16: The couples are getting ready for Valentine's Day: Leonard, Penny, Howard and Bernadette are going to dinner, and Sheldon and Amy are trying to get the perfect gifts for each other.