[flashback to Lily's appointment with Dr. Stangel:]
Dr. Stangel: We'll look at all the factors that contribute to fertility: dietary, environmental, genetic. But first, Ms. Aldrin, do you have any questions for me?
Lily: Just one, "Dr. Stangel". Where'd you get the beard?
Dr. Stangel: Well, m... my mother's Armenian.
[present:]
Marshall: Lily, I've been with Barney since 9:00 a.m. Between the sexual harassment seminar all morning and the secretary beauty pageant all afternoon, he hasn't left my sight.
Lily: Wait, so you weren't wearing a fake beard and examining girl parts all day?
Barney: Not today I wasn't.