Quote from Manny in The Incident
Gloria: Why would they do something like that? Jay: Don't worry about it. Guys pull pranks like that all the time. You just got to prank 'em back. Just got to show 'em you're willing to give as good as you get. Gloria: What do you think? Manny: Hmm, revenge I like it. [stroking the drawn-on facial hair on his chin]