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1.
If you haven't slept with as many people as you are old, you are not a whore.

Applies to both Men and Women.

Does not cover any other derogatory names/terms for an easy/loose person.
Girl: Am I a whore?

Guy: How many dudes have you been with?

Girl: 13.

Guy: How old are you?

Girl: 21.

Guy: Well, according to Jon Mabee's: Rule of Whore, you got 8 more to go before you have to worry about that!

Girl: Sweet.
by Def Mabee April 21, 2011