Short for "legvirginity". You lose your leginity when someone strokes your leg for the first time - you have a left leginity on the left leg, and a right leginity on the right leg.
"I lost my left leginity to Tom ages ago but I still have my right leginity! Jodie, stroke me!"
Boys who enjoy yaoi (a genre in Japan that contains sexual and/or romantic relations between two men); literally translates to "rotten boy"; corresponding female : fujoshi