Is sexual orientation a social construct?

Via National Review:

By some mysterious providence, three things happened in the past few weeks: Rachel Dolezal was outed as a white woman. Bruce Jenner was lauded as a white woman. And in a New Jersey consumer-fraud case against JONAH (Jews Offering New Alternatives for Healing), the Southern Poverty Law Center has spent millions to deprive any future New Jerseyans of the basic right even to try to change their sexual orientation. “I felt very isolated with my identity virtually my entire life, that nobody really got it and that I really didn’t have the personal agency to express it,” Dolezal told NBC. “I kind of imagined that maybe at some point [I’d have to] own it publicly and discuss this kind of complexity.” Nick Adams, a spokesman for GLAAD, went so far as to say that Bruce Jenner never really existed: The world “can now see what Caitlyn Jenner has always known, that she is — and always has been — a woman.”