you're young. it's not very good to start going these stuff that early, it can ruin your brain chemistry and make you addicted, plus, in future age, dysfunctional at s3x. please, if you choose to keep doing, be careful, don't ever show it to ANYONE. it's your intimacy. it's okay to discover your body when you grow up. don't ever show what you do online, because it can make sick people take advantage of you and spread it (it'd put you in problems, depending where you're from). take care, cut your nails if you want to do something, clean after and be respectful to yourself. my advice? wait some years to discover it. you're not in the best age to do so.