Amy: I don't know how to help you. You know, feelings are a part of life.
Sheldon: They didn't used to be. You and Leonard and Penny, you all poisoned me with emotions. I was like the Tin Man, perfectly content until that evil Wizard gave him a heart.
Amy: I don't think that was the point of the movie.
Sheldon: Fine, then I was like Pinocchio before that jerk Geppetto went and made him a real boy.
Amy: There you go.