"guy 1: "yo dude did you get some last night?" guy 2: "nah man the 3 date theory fails me
the theory the person you are seeing will put out on the third date  (used by blink 182 in their song wendy clear)
""guy 1: "yo dude did you get some last night?" guy 2: "nah man the 3 date theory fails me" What is the definition of "3 date theory"?