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A man is the master key ie his penis the woman is the lock ie her vagina.
Jan: Why is a man sleeping around is ok while a woman doing the same thing is a slut?

Bill: Master Key Shitty Lock.

Jan: what does that mean?

Bill: A Master Key Penis can open many Different locks, a Shitty Lock Vagina will open with many different keys

Jan: That's sexist.

Bill: No it is the truth.
by McOwnage August 14, 2016
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