Marshall: Oh, you're wearing a flower.
Barney: Thank you.
Marshall: Didn't compliment. Just observed.
Barney: I know. Isn't it?
Robin: Why are you wearing that?
Ted: Why does Barney do anything ever?
Barney: Exactly. Science. There is an 83% correlation between the times men wear boutonnieres and the times they get laid. Hmm. Think about it. Proms, weddings, grandmas' funerals. Thanks for the redhead, Nana. The "everyday boutonniere" by Stinson.