S02E14 - The Man in the Mansion
Booth: First of all, guys, they don’t ask for advice. And secondly, I am not gonna help you get my partner into bed.
Sully: Why not? It’s not like you want her. [Booth looks uncomfortable]Unless… do you want her?
Booth: Nah. Come on, Bones is, you know, she’s my partner.
Sully: Oh, that’s why you need psychiatric treatment — because you have the hots for your partner!