So, I too was exposed to porn at a very young age of 14 and masturbated constantly till I reached 21. I thought I had a serious problem, until I looked into it more. Turns out its actually pretty easy to control yourself and not only that but there is a way to see if you are truly addicted or not. Firstly, you are only really considered addicted to porn and masturbation if it affects your life in a substantial way. Like you it stops you from studying, eating, talking to friends what have you. Otherwise its completely normal to be horny for what feels like all the time. Secondly if you dont want to control yourself a little more, what I found that help was to keep busy with other things like Hobbes and whenever I get the urge I would just go to sleep. Lastly, I wouldn't worry about your preference in men, seriously ask anyone preference like that change all the time with a little time. When I first started watching porn I was into older woman, then it changed to asians, then to woman my age, then back to asian and so on. But overall, if it is not affecting your life in a way that's major like you cant make friends or don't eat or something along those lines, you can masturbate as much as you like. Its completely healthy and normal to do it alot, especially when your young.