I have been dating my current girlfriend for a long time now, and ever since we first started having sex without a condom I have been getting what looks to be rug burn on one side of my penis. It heals perfectly fine in a few days without any intercourse or masterbation, but it will come back right after we have sex the next time. We use lube, however it still will happen again. It really isn't painful, more like a sensitive to the touch. It only happeneds to one side of the head and down the one side of the shaft. Is there some skin sensitive problem i have? Also, I apologize if this is graphic, sometimes after a long "session" it can be really bad, to the point where there is actually tiny wounds. Any adivce on how to stop this? Why this happeneds?
Thanks for your time.