Please help me with my problem?

I have a serious problem that involves compulsive drawing of male genitalia. In school, whenever I come across a text book or someone else's school work, I automatically draw a magnificent penis. I say magnificent because they aren't ordinary pictures of penises, but very detailed pictures. I once even drew a knockoff of the Sistine Chapel. It was an alluring piece of art work that completely blew the minds of my peers. Watching the god of cocks reach down to his c0ck brethren inspired me to continue my work. Maybe one day I could become the Picasso of penis. What is wrong with me? Why can't I stop?