On the question of choice, it must be noted that all sex but rape is voluntary and thus every sexual act involves a conscious choice. A person's inclination toward a form of sexual conduct may not, for any number of reasons, be consciously chosen, but the mere existence of desire does not justify the act. To accept otherwise would be to validate adultery and pedophilia.
Nevertheless, there is plenty of evidence that homosexuality is not innate. There is a very considerable body of testimony from tens of thousands of men and women who once lived as homosexuals. These ex-"gays" have renounced their former lifestyles and many have become heterosexual in self-identification and desire.
Look at the long term prison population in custody and when they are released. A choice of behavior regarding homosexual sex.
Remember, Feminists consider ALL heterosexual sex to be rape.
And a more sizable body of evidence from the tens of millions who say that it was not a conscious choice that you will not considerer because you choose not to.
Funny thing about choice, isn't it?
You continue to discuss the choice of engaging in an act, while I discuss the existence of the attraction.
If the existence of the attraction is not a choice, then homosexuality is not a choice.