Schroedinger's Virgin

A virgin that is also not a virgin at the same time, since someone's virginity depends on the amount of information others have about them and everyone's own definition of virginity.

Example: Even if people count anal sex as a valid first time sexual act, a female that has not had vaginal sex yet, is still a virgin in other people's book, especially if they never find out about the different sexual acts she has practiced.

"She's only had anal sex before, she's a schroedinger's virgin."