There are numerous examples of homosexuality in nature beyond humans if you want to ignore the fact that homosexuality has always existed in humans. And it has been written about in literature since at least the Iliad which was written somewhere between 750 and 850 B.C.E. And it most certainly existed for thousands of years before that.
And either, it's a biological fact or you can choose to be gay. So, can you choose to want to have sex with a man?
There are your facts. Now continue to ignore them.