lots of gay men, bored of having sex with the same woman for 20 years - find themselves being gay, just cuz it's some sort of excitement in their otherwise boring life. Trying not to get caught, going to public bathrooms, etc. etc. When they were in their 20's, and life was fun, being gay was farthest from their minds.
my opinion on why so many older men turn gay. and usually they're white.