when I woke up and peed I saw some cracks on my penis that wasn't there yesterday.
it is going to be always there? Why did it appeared from night to day? is there something I can do to "fix" it? It can happened because of masturbation or sex?
I had a similar experience when I was 14.
I don’t know how the crack appeared, but you will probably have it for the rest of your life.
I consulted a doctor about mine and he said it was just a normal variant among penis heads and nothing to worry about.