Many straight girls secretly desire a lesbian experience, but maybe never sought out the opportunity or were too scared to follow through. They're sure of their sexuality but they just wanna check it out, because they're sexually liberated. But when it comes to the crunch, they don't really wanna lick your pussy. Mostly they're just fantasizing.
When a straight girl meets a lesbian, she immediately tries to flirt with her, she wants to know that if she were to sleep with a woman, that this lesbian wants to sleep with her. What she forgets, is that lesbians don't think through their dicks, or feel a need to prove that they can satisfy a straight girl, or turn her lesbo, so most have already crushed the possibility of sleeping with her as soon as they find out she's straight. But it doesn't stop us from fantasizing.