All I know is, with differing friends who have come out over the years, if homosexuality were a choice, if it were as simple as just choosing not to be gay...no one would be gay. Because who wants to be ridiculed, attacked, maligned (even killed) based on an orientation that has no harmful impact on the community, but is treated as a crime/criminal.
I've had to wash blood off my body twice (once after being attacked following a Pride Parade). Never washed away the gay, although I've been known to frequently wash away the gray.