About a month ago I discovered a scab on my penis on the buttom half. I had figured it was possible just from me and my girldfriend grinding with clothes on, which I had imagined possibly it was from irritation from the material. After about a week it went away and I was looking clean.
This evening I looked at my penis to find another very tiny scab and now the bottom half, only near the head, is more wrinkly then usually and is lighter then the rest of my shaft. This happened two days after we were grinding. Also in between the two days I have been masterbating quite a bit then usually, normally 3 times each day. It also has little to no will to become erect, but I feel this happens whenever I fear something is wrong with it.
Going on to yahoo answers last time gave me a bunch of "Go to the doctors and get it checked out." But I need a more plausable answer then that. I lot of places say its normal, but it just seems to weird. Im not worried about it being serious, as it doesnt seem life threatening. I just don't want a disfigured penis like most men.
I am also circumsised to those who are wondering.
Skin irritations such as you describe is common in penises; the cabbing may be the result of overaggressive stimulation or (as you surmise) rough material rubbing against the penis. This is not serious in itself, but over time it can cause the build-up of penis scar tissue, which can have an effect on penis sensitivity (and can, in some cases, contribute to curvature of the organ). Regular use of a quality penis nutrient cream (health professionals recommend Man1 Man Oil) that includes acetyl L carnitine, a neuroprotective ingredient, can help to maintain penis sensitivity and reduce scar tissue build-up.