Sign #1: The other day, you saw the Harvard baseball players lip-synching to Call Me Maybe on the Today show. When you watch the viral video on YouTube, your 7-year-old thinks it's SO funny that Mommy is watching that. She's known the song for months.
Sign #2: You think the guys are cute but what most excites you is that their YouTube channel supports Friends of Jaclyn Foundation, a non-profit dedicated to improving the lives of kids with brain tumors.
Sign #3: You start fantasizing about organizing a dance flash mob to the song. On your commuter train.