That's not to say that there do not exist people who deliberately decide to experiment with homosexual activity, but that is an entirely different matter from people who's core identity is homosexual. I knew since I was fairly young that I had an artistic aptitude. In early school years I discovered that I could draw and model objects better than most people in my class. In later school years I discovered that there were people who could draw and model objects an awful lot better than I could. It was later still that I discovered that being an artist isn't necessarily associated with one's ability to draw and model objects.
Artists march to the beat of a different drummer.
Each artist is largely as different from ever other artist as he or she is from society at large, but they share a bond of dissimilarity that serves to unify them. In addition to having a unique vision of his or her surroundings, the artist has a compulsion to create. It is this compulsion, more than the actual practice of creating, that makes one an artist. Creativity comes in many, many forms, each as legitimate as any other. If an artist claims that something he created is art, there can be no dissuading him.