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Barney: How do you keep a girl from becoming your girlfriend? Simple! The rules for girls are the same as the rules for gremlins.
Barney: Gremlins. Rule number one: Never get them wet. In other words, donít let her take a shower at your place. Number two: Keep them away from sunlight, i.e. don't ever see them during the day. And rule number three: Never feed them after midnight. Meaning she doesn't sleep over, and you donít have breakfast with her. Ever.