hi i am 18+. my penis size is small,, it s only 4 inch and it s curved in more than 30 degree on left side. my personal area is very dark then my other body parts. i heard penis enlarge is possible to a specific device or an operation.i strated Masturbation when i was 13 year old,, my body is very week at this time this is happened to Masturbation. tell me how to fix my problem.