Ho there. I have kind of a similar problem - combined with an extremely low sex drive. I've been repeatedly advised to stop watching porn, which apparently could be the cause of this.

My advice: go see a doctor, and tell him your story. Suggest that he check your hormones, an await results. In the mean time, cut off all porn viewing. I'm told 2 months of abstinence will "reset" your sex drive, which, admittedly, sounds like utter ******** but hey - it's worth a shot.

Good luck to you and your glorious penis.