On all the forms I’ve ever had to fill out in all of my years of purchasing firearms, I’ve never been asked my sexual orientation.
Most of the homosexuals I’ve met have been eager to establish that they were gay by affecting lisps, swinging hips, or any number of stereotypical behaviors.
I don’t know why they engage in these stereotypical behaviors, but I don’t doubt the source for that reason.
I can guess about why, advertising, but I don’t know.