So I have been experiencing a burning sensation in my testicles every time I touch it for a few days after "jerking off" and now the foreskin below the penis is clumped together and appears darker then the rest of the scrotum when I stretch it apart. Also my penis feels and looks unusually wrinkly and there is a tiny line of dark red separating the shaft and the head. Now I have three questions: 1. What is this that I have? 2. What is the cause of this? 3. Is this serious?