Hi everyone. This is my first post. This problem has followed me around through several relationships / one night stands and I'm hoping someone here might be able to shed some light on the issue.

Basically, I have trouble getting turned on by a person and I often lose my hard on for no apparent reason during sex. It sucks because it's really embarrassing and takes a shot to my manhood. Of course the thought of it in the back of my mind during sex probably contributes to the problem too, almost like a vicious cycle.

I have a couple of theories as to what could be the issue. The first, I'm a porn/masturbation addict through and through lol. I've watched porn since I was about 13 and masturbate frequently, like at least once a day, but sometimes 3+ times a day. One theory I have is that I'm "desensitized" from watching so much porn, with beautiful women, elaborate fantasies, etc so it's hard to enjoy a real life average-looking person. Whenever I watch porn/masturbate I never have any issues getting an erection. Could it be that my brain is just wired to be turned on by porn now and not a person? Also, when I masturbate WITHOUT porn, it's harder for me to get turned on and maintain an erection and I have to resort to playing out fantasies and such in my mind to get off.

The second theory would be health issues. i.e. blood circulation issue, low testosterone, or something else. It's mere speculation though. I'm 23 years old, exercise frequently (3-4 days a week, plus my job is very physically demanding), eat reasonably healthy, etc. So, it shouldn't be a health issue. I do have trouble sleeping at night though and usually wake up tired and feeling unrefreshed. I also started smoking at a young age (12) and quit about a year ago, but I still smoke occasionally when I'm drinking or around my gf (she smokes). Still, at my age the smoking shouldn't be causing problems.

I'd really like some help with this issue if anyone is up to it. Maybe it's health reasons, maybe it's all in my head, I'm not sure. All I know is it's been causing me grief for years and it really sucks. Thanks..