There is no "gay" gene. Neither is there a bisexual or asexual gene. Every human is built and born for heterosexuality.
Western science tried VERY, VERY, VERY, VERY hard to find a "gay" gene but evem BRITISH SCIENCE (ahem) couldn't come up with a gay, bisexual or asexual gene.
The CHOICE is made in a person's early-mid teens.
I don't really believe that people of that age can made a rational choice to deny their nature and CHOOSE a behavior SO against their nature.
They’ve never proved it?