“In the Gallup data I’ve worked with, if you’re under 30, 6 percent identify as L.G.B.T. If you’re older, it’s closer to 3 percent. But it’s not that proportionally there are more L.G.B.T. people among the young, but that young people are more likely to disclose.”
It's also well-known, but not disclosed here, that many young women self-identify as a lesbian or bisexual at some time between ages 18 and 30 but then eventually marry and have children with a male spouse.
I think popular culture has been brainwashed that “we are born this way.” When it seems that young boys were molested and then changed, and young women, are more fluid, and were just experimenting, as the popular saying goes, “I tried it in college.”