Sheldon Cooper: Whoa. That girl just took a book on geostatistics.

Tam: Yeah, so?

Sheldon Cooper: That’s not required reading for any science course.

Tam: Maybe she wants to squash a spider with it.

Sheldon Cooper: No, look, she’s reading it. Who is this mystery woman?

Tam: Should we invite her to have lunch with us?

Sheldon Cooper: I don’t know. So far, it’s just been you and me, and we know that works. Do we really want to mess with success?

Tam: We could think of it as an experiment.

Sheldon Cooper: Oh, you do know how to push my buttons.

Tam: All right, go ask her.

Sheldon Cooper: Why me?

Tam: Your lack of testosterone makes you adorable to women.

Sheldon Cooper: I can’t argue with that.

From Young Sheldon – Season 1 Episode 15: ‘Dolomite, Apple Slices, and a Mystery Woman’ (1×15)