Quote from Joey in The One Where Rachel Tells...
Ross: Then when I turned around, she was gone. Phoebe: Oh, Ross. Ross: But, hey, in my defense, I just found out that condoms are only like 97% effective. Joey: What? Ross: I gotta go find her. Joey: Hey. Hold on! Are you serious? So, like, three percent of the time they don't even work? Huh? They should put that on the box! Ross: Evidently, they do. Joey: What?!