Yes, in some circles that is it exactly, lesbians are considered virgins..
reminded me of a passage in a humorous fantasy, The Inadequate Adept by Simon Hawke. An elf has just been saved by a dragon, swooping down, breathing fire at the ugly unicorns who do not like virgins chasing her. She is brought up to the castle turret before the wizard who ordered the rescue, with the prince standing by
W: "Why were the unicorns chasing you?"
B: "Obviously, she's a virgin."
E: "I am NOT a virgin!"
B: "The unicorns knew better. They would have smelled a man on you"
E: "I have never
had a man on me, thank you very much!"
B: "Then what did you mean when you said you weren't a .....""Oh, I see"
oops... edit - "B:" was Prince Brian, cursed to be - no kidding, a werechamberpot. He was only human at full moon until the curse was lifted