[NSFW] why was I like this when I was little and up to my age now?

Okay so….I’ve been thinking of past….Eh I guess sexual encounters I’ve had. I haven’t had them with anyone except my neighbor. (but it wasn’t sex, more like…..Exploring each others bodies, but pleasuring each other too….) then it hit me…..I’ve always loved the pleasure I got from touching myself, and I’ve noticed that ever since I was little I’ve been….basically a horny boy in general. But I’ve always wondered….“why?” I can never answer really why, and it’s been bugging me for a while. yes I do pleasure myself on a daily basis (at night before bed like most) but I mean when I was little I always played with it (humped pillows, rubbed sensually, rubbed it against my arm, and methods) and also I always played with barbies just to get them naked and touch their breasts and lower area. And I’ve also humped my mom while sleeping (I was horny and I liked sleeping with my mom when I was little) So Fluther…..The main question is, why was I like this? Is this some type of disorder I have with myself? Is it going to effect me greatly when I’m an adult? Why???