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1.
Having the fixation on doing equal sexual favors for a pair of best friends.
Brandon - Hey Libby wanna hang out?
Libby - Sure, only if Matt comes though.
Brandon - Best friends rule?
Libby - Oh yeah, all night ;)
by MattH1008 January 17, 2009
2 11

Words related to Best Friends Rule:

equal favor friends sex sperm