this happened wheni was 19....drank wayyyyy to much and had unprotected sex with some gnarly lookin fat chick(thought shed be clean cuz who'd **** that cept me? :$ ) couple weeks later i had some green color dischage from my penis(only about one drops worth) and havnt had that since....i have ;however, had contunual shedding of the skin on the head of my penis which results in waaayyyy more smegma than usual......im 21 now and ive still got the shedding problem
i would have it checked out by your doctor. does it itch or hurt? you could have an STD or a yeast infection. some STD show little to no symptomes and can cause sterility if left untreated