Lesbian in a Bar

A guy walks into a bar and sits down next to a girl and starts
flirting with her. She turns around and says, "You know, I'm a
lesbian." He just nods and keeps flirting. So she turns around
again and says to him, "Do you know what a lesbian is?" He
replies no. She says, "You see that woman there. I want to strip
her down and have open sex with her all over the floor." Upon
hearing that, the man starts sobbing. She asks, "What's wrong?"
And he says, "I think I'm a lesbian too!"