Big Bang Theory Quote
Leonard: Where's Penny?
Sheldon: She returned to her apartment. I presume to shower and vomit, not necessarily in that order.
Leonard: I wonder why she didn't say goodbye.
Sheldon: Are you expecting me to offer an explanation of human behavior?
Leonard: I know. I just thought as an outsider, you might be able to provide a fresh perspective.
Quote from S03E23 - The Lunar Excitation