Hi, im 16, male, I would like to ask you about something: occasionally, I have painful urination, a painful hot stinging, I have never had any kind of sex, this only occurs in the spells of time when I masturbate (it usually happens immediately after I masturbate), the last 7 month period that I kicked the masturbation habit it did not occur (It generally occurs with a frequency from every 1 to 3 months). Drinking large amounts of water during the spells of pain (which last from 20 minutes to an hour and a half) seems to quicken the rate at which the pain and whatever the discharge/urine is. It always has the same color as urine. What could be the cause of this?