I am female and consider myself straight.
I have yet to be attracted to another woman, or experiment with one, or be curious about what it would be like, etc.
I see nothing wrong with homosexuality or bisexuality. I have heard many people say that almost everyone is at least a little bit bisexual, so maybe I am in the minority here, but I just am not attracted to women at all. For me, it's kind of like I see them all in a motherly or sisterly way.