Slap Bet
S2, E9: Robin tries to hide her secret past, and the guys discuss opposing viewpoints on getting to know women: while Ted prefers to know everything up front, Barney wants to know as little as possible.

S2, E9: Robin tries to hide her secret past, and the guys discuss opposing viewpoints on getting to know women: while Ted prefers to know everything up front, Barney wants to know as little as possible.