Hello, this is my first time posting and i am pretty small, dunno if I should be posting here or not. measured once, i think i'm 6 long and 4.75 around. About myself, i'm 23 about 5'9" and I weigh about 110. I'm pretty underweight and i'm trying to get to a healthier weight. I've been smoking cigarettes since i was 18 so about 5 years now. I also smoked a lot of pot during that time and havent smoked since april 2006. My eating habits are horrible, i dont eat enough, sometimes almost nothing during the day. i drink coffee a few times a week and get no excersize. these are all things i'm hoping to change this year. Now to the problem. My penis when fully aroused and erect points straight up. I used to wake up in the morning sometimes with an erection where i literally had to bend my torso horizontally to pee. My penis when fully aroused was only able to bend down so that the head of my penis might have been 2 inches away from my belly at most, especially when i throbbed it. i've noticed this past year i've been having problems attaining an erection and maintaining it. when i was younger, i was almost embarrased by getting erections, they would come spontaneously and last for about 5-10 mins. it sort of sucked at work hehe. i could get erections with arousing thoughts quite easily, especially if i thought about it a lot. now it seems i can only get a "full erection" with direct stimulation or sometmes with arousing thoughts and porn but quite rarely and even then i need physical stimulation to get it going and keep it from going down.. i can still oragsm quickly, easily under a min when having sex or masturbating. when i masturbate, it only gets "fully hard" right before orgasming. I can get to oragasming semi erect. infact, i've tried to get it so that im just about to oragsm semi-erect, then i let it go and my penis will get to full erection because its been really aroused. but this full erection isnt quite what it used to be. it still points straight up vertically but i can bend my penis downward so that the head is about 3 to 4+ inches away. if I wanted to pee I'd still have to bend over but not as bad as when i was younger. and this only happens when i'm really aroused, like about to cum. When i'm with my girlfriend or masturbating, my penis only stays hard with stimulation. it will start to go down quickly if the stimulation stops and be semi erect. I also dont seem to wake up with "morning wood" as often and when I do, its not a full erection. at most its between semi erect and fully erect. I dont remember if i ever woke up with a full erection. i just started having sex recently like a few months ago. i know its kinda late but atleast i did it. there were two occasions that i remember that it kind of hurt. The first time was when she grabbed my ass and thrusted me into her. I'm not sure exactly what happened, but there was a sharp pain in my penis. i'm not sure if it was from being a blunt force (like jamming your finger) or from my penis being bend down too far. either way it kind of hurt. i didnt lose the rection and was able to continue ot oragsm. and my penis was somewhat sore for a couple of days. the pain was dull, and came about a few times during the day. i can only describe it as a dull pain that lasted a few seconds. the went away. that was around for maybe 3 days. i dont feel any pain whatsoever from that. I didn't notice any bruising of the sort. MY penis didn't break in half or anything. I've heard stories of guys cocks breaking or something. so i dont think it was that bad. there was also a another time of some rough sex were my penis is kind of sore at the base but not really bad. there wasnt really any pain and didnt have any pain afterwards either. anyways, to recap in short I am underweight, smoke, and dont excersice and eat poorly. Could this be contributing to it? I've only noticed this problem this past year. maybe its been gradually happening. My erections dont seem to be quite as throbbing hard as they used to be. and I seem to have a tough time staying hard. It still points straight up and i can still orgasm quite fast. under a min easily. The missionary position is easiest because of the way my penis is shaped and erect. kind of like a curved bannana but not quite as curved. I felt pain during sex once or twice from the incident i mentioned. again not sure if it was like jamming my penis or bending it down too far. Felt some soreness and pain afterwards. the dull pain was there a couple of days. it came in spurts a few times during the day and lasted a few seconds. not feeling any pain now. Whew! anyways, thank you very much if you read this and I truly appreciate any advice you can give me. I don't have insurance at the moment but I wanna go see my doctor for a full review of my health and what i can do to get it on track. unfortunatly doctors are expensive so hopefully i can get some insurance soon. How should I bring this up? will my doctor be able to help me? Are there tests to see for sure if there is any physical reason i am having problems maintaining an erection? Maybe like an x-ray of my penis or something? I basically want my full erection back like when I was 20. being 23 it seems so young that i am having problems It's kind of embarrassing that I'm a worrying kind of person in general so in bringing this up with my doctor i dont wanna make it seem like its a bigger problem than it is that i'm so worried about my penis. I wanna be able to enjoy the next 20-30 years of sex with no problem. again, thank you for any advice. please share any similar stories and how they were resolved. any hope of me getting that really hard erection again? i promise i wont ever be embarrassed by my erections again. i will be proud of them even if it is small hehe.