Man A: "Hey man, did you see that girlwith the nice ass?"
Lesbian B: (the user of the lesbiotic scale): "Yeah, I'd give it a 9"
Man A: "Out of 10?"
Lesbian A: "No, she's referring to the lesbiotic scale"
Girls who are straight, but enjoy looking at other girl's boobs, or will often make out with girlfriends, but have no real interest in being a lesbian.