“Lesbian Star Rankings”

Ok, I have a terrible, guilty and un-feminist confession. I watched both seasons of “A Shot at Love with Tila Tequila” and (for the most part) enjoyed them.
I tried watching the first episode of that new bisexual dating show MTV has but I couldn’t do it, it creeps me out that they are having indentical twins kiss a whole bunch of the same people. (That is just my personal opinion, I have nothing against other people who like to see that.)
However, one theme that came up at the beginning of the first two seasons, as well as this new show (before I became creeped out by it) is what I like to call “lesbian star rankings”.
Basically, in the first episode of all three shows the lesbians/bisexual girls say they are a certain star rating based on what they have done with men. “Platinum star” is when you have never done anything with a man, “gold star” is when you have only kissed a man ect. ect. The ” precious metal star” you are decreases in value depending on how much you have done with men.
I myself am a lesbian and have NEVER heard of any of these “precious metal rankings” anywhere but on MTV. I cannot imagine asking another woman her “precious metal” or calling myself a “precious metal”. I mean, someone else’s sexual history is none of my buisness(with the exception of a parter who has had unprotected sex and no STD tests). I think it is safe to say that many lesbians would agree with me on that one.
This is pure specultation but I suspect those “precious metal rankings” are not usually used by women. I suspect that they are used by men when talking about women. I COULD BE WRONG THOUGH!
Frankly, I find these “precious metal star rankings” really dehumanizing. They make it seem like lesbianism is a form of virginity and that having sex with men makes women less valuable.
It is the same virgin/whore concept but with an especially creepy twist.
I guess my main question is Have any of you ever heard of lesbian “precious metal rankings”? If so, where and in what context?
Here is some evidence/an example.