Well you're going through puberty. Your penis will become larger an-
Ok I get it with my bottom part!!
Ok... but you need to know this stuff. Your shoulders become broader and muscles increase. You gain some weight/ Fat but you become taller. Your voice becomes deeper and you grow hair in many places. And you'll now have produced semen.
Ok... Do I need to know about girls too?
Sure, Girls start to develop breasts and start their period. an egg or ova release and bleeds and that is called menstruation, OH!! I almost forgot, when you release semen it is called ejaculation and it sometimes happens when you have wet dreams.... caused by looking at things you like in a different way to other things like your computer games in your dreams. Your welcome and go upstairs and finish your homework!!!