Humans, let alone most species on the planet, have been selected by evolution to have male and female species to encourage reproduction. Many species exhibit homosexual tendencies/behaviors such as Lions, species of birds, humans, and apes as well as many other animals. Evolutionary selective pressures have no sense of "right" or "wrong". Most species that tend to favor homosexuality will eventually die out because of the lack of reproducing while the heterosexual species will thrive because of their instincts to reproduce.

Although humans exhibit homosexual behavior, there's still a great abundance of us that are heterosexual to reproduce.

I don't care if someone is gay (I'm bisexual) or lesbian. I care about how morally good of a person you are, not what your sexual preference is.