Robin in “19x05”

[Trying to guess an answer with John Barrowman raising his hand]

I don't even think you are gay, Barrowman! I think. I've seen all this pretending that "Oh, don't worry girls, I'm just gay, now I'm going to kiss you and fondle my stuff," it's disgusting! The oldest trick in the book! What would Barrowman know? Oh, Lulu! It's Lulu then!