Quote from The Big Bang Theory 10x05 Sheldon Cooper: When I opened the door, I saw my father having relations with another woman. Penny Hofstadter: Oh, that's awful! Sheldon Cooper: I know. It's also why I never open a door without knocking three times. I mean, the first one's traditional, but two and three are for people to get their pants on.
14 Best The Big Bang Theory Quotes from 'The Geology Elevation' (10x09
Quote from The Big Bang Theory 10x09 │ Leonard Hofstadter: It’s always fun watching him read someone else’s work. Penny Hofstadter: It’s like scrolling through the emojis on my phone. Sheldon Cooper: Ye– why? Eh, why?! Oh, that’s why. Amy Farrah Fowler: Sounds like the night we had coitus.