Definitely have UDS, and have said so from the time I was an ugly kid. And when I became an adult, and tried to conform and date women (rejecting the possibility I could be gay), very few would have me. It was my military uniform and income security that attracted a handfull, but never the guy inside the uniform they wanted, partly why the relationships failed.
Until I came out gay. Suddenly guys were telling me I was handsome, something no woman ever said to me. Of course I knew they exaggerated, a gay game we all play, but at least I could pretend. And believe that men saw things in me that never appealed to women, but which worked in a man's gay world. In other words, I had found my element, where I was only half as ugly as I'd been just the day before, with different rules applying.
Now I'm old and fully ugly again, but that was inevitable, to be expected. But thanks to coming out in the nick of time I had at least 10 years when I wasn't so much an ugly duck anymore, and if only for that single reason I will always be happy I finally began to call myself a gay man.