Otherwise, television dramas about AIDS have preferred to focus on nonhomosexual victims of the disease.

Is it defined in terms of the sexuality of (say) the individual or artist who expresses or possesses it - and does that mean that no nonhomosexual can possess/express it?

Some do not pay attention to transwomen identifying as women and continue to view them as men, calling transwomen who feel attracted to men "homosexual" and transwomen that are attracted to women as "nonhomosexual".