Hey DavidThomas69. I'm gay too and also have been attracted to younger boys from around 13-17 and up to 24, though I feel being attracted to young boys has become more of an issue for me as I've gotten older (I'm 27 now). Maybe sharing my story and involvement in all this will help you out a bit.
I first started looking up porn of guys when I was around 17, but I always liked the ones who were closer to my age, so twink porn always did it for me. For some reason or other one day, I got curious about sexual development and wanted to see how younger guys look naked because I never saw anyone naked as a young teenager, so I went on a file-sharing network and found some pictures of 13 year-old boys. So I was satisfied with that, but I didn't turn into an addict, at least not yet. I was 18 when I came out, so I was more attracted to guys my own age, but also some in high school because most of my friends at the time were high schoolers and we'd hang out and smoke weed and do stupid stuff. A lot had been friends with my first boyfriend (he was 16 when we went out, I was 18). That probably wasn't the best idea for me because I was the oldest in the group, but the way I saw it, I was living the life I never got to experience in high school.
One of the problems with having underage friends is also that depending on your own maturity level, you don't really notice your age so much. I see that as a natural thing though when you get out of high school and start going into young adult mode, sometimes your friendships merge and become this weird thing that isn't so age-restricted, but that's where the danger lies if you end up attracted to anyone in the younger range. I learned that the hard way after I had messed around with one of my friends when he was 15 and I was 19, so regardless of the fact he was consenting, it was kinda illegal. Of course that was before I knew the law. We're still friends now. I kinda see age of consent in the same way as you do though. I don't personally agree with all of the law, but it's not a line I ever want to cross because the paranoia just thinking of what could happen isn't a comforting thought.
As I've grown up though and through all the questionable porn I've seen and younger friends I've associated with over the years at various points, I believe I've really more or less screwed myself up to some degree with the porn and fantasies. I don't think it was even so much sexual in the end stages as much as I loved the thrill of seeing something taboo. But I still am messed up, because being 27 and having such a specific standard and basically wanting skinny guys with very little body hair who look super-young doesn't help your chances of finding someone, especially not when you're gay and pushing 30 lol.
I don't know if all the porn and nudist pictures is what changed my attractions and expectations or not, because I know during my teen years I didn't really know who I was yet. As a result, there were a lot of choices I regretted not making, chances not having taken, and I've fantasized about those situations for YEARS and still continue to wonder about them.
I'm not an incestuous person either, but I remember when I was 13 I wanted to do things with my cousin and a friend or two I was attracted to. And I think that's part of what spurred my curiosity as a teenager. I never saw other guys naked, and I really had no one to do anything with or any idea of how to talk to someone about just messing around sexually. But I've always been the shy guy too afraid to talk, so porn has been my thing. I can relate to feelings of attraction for younger guys being stronger too, and it's more of a voyeuristic thing for me as well. I don't go around fantasizing of having sex with them as much as I fantasize about watching them with each other, lol.
I've never actively pursued anything pertaining to my attractions, and like you, I don't see myself as a danger to other people because my head's on straight and I genuinely love and care for people and want to help them. But left to myself, with a computer and all the porn (legal or otherwise)? It could get bad, and in fact it did today only because I caught myself looking at things for over an hour and I'm like okay, it's probably time to stop.
All of this is kinda funny though, because in real life, I can't stand younger teenagers (at least not straight ones) because of how obnoxious some of the guys can be, so I've come to see it as chiefly a taboo fantasy and mostly a lust thing. Some of them can be very attractive to me, but at the end of the day, it's similar to my experiences with past boyfriends. Yeah they're gorgeous, but they can also be incredibly annoying lol.
As for reading erotica, I don't see any harm in that. Just be aware that it can contain a lot of odd or interesting scenarios sometimes which are meant to get your sexual thoughts flowing, so you might not be into incest per se, just the fantasy of it and the idea of experiencing the situation from the main character's perspective.
Hope that helps somewhat. I feel if you're not a danger to anyone or yourself, you shouldn't worry. Try cutting down on the porn and erotica though, because it can really change how you see things in real life and affect what you're attracted to, or at least the level at which you're attracted to various things. But try going without it next time you're horny and see if you can handle it. Learn to work with just your mind and see if it helps.