When Penny locks herself out of the apartment, she comes to hang out with Sheldon in his as he plays Age of Conan. Penny, frustrated by her recent failures in life soon plays and becomes addicted to Conan.
Sheldon [to Kripke]: Also, I am given to understand that your mother is overweight. Raj: Oh, snap. Sheldon: Now of course, if that is the result of a glandular condition and not sloth and gluttony then I withdraw that comment.