You have Peyhronnies Disease(SP?). What is basically is, scar tissue in your penis. Your penis isn't really designed for masterbation, at least not chronic. Its made up of delicate tissues that ARE NOT very durable, and very prone to injury. You have injured these tissues masterbating, causing scar tissue to form, which in turn lead to the curve. you have scar tissue on one side, causing the uneaven curve. most people don't realize this until its too late. You must be VERY carefull when masterbating. Do a search engine on Peyhronnies, there is alot of info out there. I don't think i spelled it right though.