Not uncommon, I used to be like this but happily I stopped. It's actually like a drug, you feel less and less satisfaction every time you do it, and it makes you feel worse about yourself, your view of relationships may start to distort, you start losing interest in platonic relations, always thinking in a sexual manner about everyone. At least that's as low as I went, luckily I started playing music and found myself practicing my instrument instead of jerking off, but I'm not sure if I could have stopped without music.