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1.
What humans of the female variety get when witnessing attractive humans of the male variety in a state of partial or full undress, either alone or in pairs, preferably whilst doing rude things. Or, to a somewhat less common degree, other attractive humans of the female variety.

Side effects include: blushing, grinning, squeeing, cackling and/or suspiciously lengthy showers.
Susan had a constant ladyrection during Brokeback Mountain.
by bald_rick May 26, 2012