I am a brony. I like a cartoon show made for little girls. Why? Because its got good characters, its pretty funny, its well written and well animated and the fans produce a lot of cool content. The shows not perfect, and there are other shows I like more, but its still pretty good.
Do I find ponies sexy? No, they're cute, but not sexy.
Do I obsess on ponies over everything else? No, I obsess over a lot of things, video games, anime, manga, american cartoons.
Am I a big loser? Yeah, but I was like that long before I ever heard of mlp.
Are there people who find ponies sexy or who obsess over ponies too much? Of course, but I don't care, as long as they aren't hurting anyone they can live however they like, as can I. Are these people the vast majority of bronies? Dunno, I ain't all knowing.
If you think I'm creepy because I like a cartoon show, go right ahead. I don't care what some anonymous guy who doesn't even know me thinks. I'm certainly not going to change what I like because of what others think, and neither should anyone else.