i am 15 just turned and i think i have a short penis but i don't know. i am 6'4 tall and 258lbs and my penis is 4 inches erect. i think i have hit puberty i have a lot of hair down there getting facial and have armpit hair. i didn't understand hen it sounded like my voice dropped i never squeaked and it kept getting deeper. i am not sure if i just haven't started to grow or some genetics messed up cause when my dad got my mom pregenate with me he was a body builder and he was on steroids so can some one help me out? i am kinda getting worried and embarrassed to talk to my mom about it since she's all i got now. if so it would really help me out and make me feel better