I am 27 year year old male who has masturbated for about 15 years. I noticed how my penis was getting crooked at the tip (inch or so) and felt small hard line(s) or pieces under skin. It has been so for years and I kept forgetting it, then worrying, then forgetting. Now it feels like the tip itself is a bit separated from rest of the penis as I touch and under it, between penis and the tip, is kind of lower line/castle moat/like I can sense flesh is not smooth down there, line being pressed into it. I tend to do it through clothes, pushing on the tip. Is this what caused it? I don't have erection issues. Will it cause problems later? And main thing - can I get cancer from this? I keep hearing testicles get, but nothing about penis.