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The 2 Week Theory states that a woman is at her peak horniness around the time of her ovulation period. (Approximately 14 days after the end of her last period) During this time, it is easier to get what you want out of a girl. However, BEWARE! as soon as the 2 week period wears off she will be the crazy fucking bitch that she becomes every month!
Guy 1: "Hey bro guess what!"
Guy 2: "what's up?"
Guy 1: "Brittany is horny as fuck she just gave me a hand job in the middle of class!"
Guy 2: "Yeah I know. I got a blow job before class. She is on that 2 week cycle."

-JaHi inventor of the 2 Week Theory
by JaHi October 30, 2013
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