[flashback to Marshall in Stella's office:]
Stella: Look, even if it is something, it's easily treatable, so try to relax.
Marshall: Okay. Hey, what was it you were saying before about the guy with the butterfly tattoo?
Stella: Oh, that... That's nothing. It's just a little crush. So I will be calling you with your results.
Marshall: Oh. Okay. Thank you.
Stella: Oh, sir, your book!