Leonard: He just made her laugh, something's wrong.
Raj: Do you see the way she's looking at him?
Howard: Yeah. Like Bernadette used to look at me.
Raj: I keep telling you, close the bathroom door.
Leonard: Ah, did you see that? She just touched his hand and he didn't swat it away. What is happening?
Howard: Okay, the simplest explanation is usually the right one.
Raj: Which is?
Howard: That ain't Sheldon.