I know its a little more sexual than most posts on here seem to be and if i'm breaking any rules i apologize in advance.
To start off with, I'm a 19 year old gay university student who is generally happy with most things, i'm fairly skinny and though i dont work out or anything i wouldn't consider myself unfit by normal standards. I eat a bit of junk food from time to time but also eat just as much in vegetables and meats. I've also got no major health issues or illnesses that i know of.
But for a little over the past year or so i've been having trouble getting as hard as i used to, up until about halfway through 2010 i was used to getting rock hard erections almost every time with occasional almost painfully hard ones, but since i started uni in 2011 i've had progressively weaker and weaker erections, and i often have the feeling of slight discomfort at the base of my penis (even when totally flacid that i occasionally felt in the past when i was slightly painfully hard.
I went to the doctor about 9 months ago and had a full range of blood tests which all came back normal and she wasn't able to give me any answers as to what the problem is that's causing it. I'm not sure if its physical or psychological, though i'm more inclined to think its the latter since i haven't had a case of 'morning wood' since all of my issues started and during both masturbation and sex i only seem to be about half hard.