Amy: Well, I'm going. You couldn't stop me from getting a massage at the mall, and you're not stopping me now.
Sheldon: I shouldn't have to see my girlfriend get groped in public by another man.
Amy: And I shouldn't have to see my boyfriend riding on a train for children around the mall.
Penny: The little choo-choo for toddlers?
Amy: And now you know why I needed the massage.