Rantlet, the first

I promised a rant, but time sneaked up on me and before I knew it, it's 11 p.m., with physics yet to study and a shiny new Harry Potter book to read.

But one thing today has been bugging me too much to not spew out on the intrawebz like I usually do:

While showing some of Andrea Gibson's live recitals to my mother, who tends to appreciate art from a very educated and objective point of view, she made a comment: "This is pretty good. But why are you showing me lesbian poetry?"

I could give two hundred reasons as to why. But that isn't the point. What's making me see red here is the epithet. Why is it "lesbian poetry" and not poetry? Why does the author's sexual orientation make the art itself a completely isolated object? How come no one goes around calling poetry by heterosexual people "straight poetry"?

Why, according to her, are lesbians who make art not artists?