But there is plenty of anecdotal evidence. It always seems to be the fat out-of-shape guys that have the limp noodles, whereas the skinny guys always seem to have wood between their legs.
Yes and no. If you have ever researched heart disease, you'll soon discover that many young, thin men have heart attacks. I've seen thousands of p-o-r-n videos where men are fat and out of shape, and have great erections (possibly aided by drugs). Once a young, thin man has heart disease, he's put on all kinds of allopathic drugs, most to them out to rob him of his erection and libido. There is no doubt that the scourge of diabetes (common among Americans, and are generally outwardly obese) have performance issues. But you cannot make a blanket statement like that.
And if anything, it seems to be in inverse proportion to how muscular they are. So be glad you're skinny and just try to stay that way.
Muscular men don't get that way by accident. They most likely workout or have physically demanding jobs. Testosterone helps build muscle mass, and also play a vital role in producing NO (nitric oxide) and other hormones to keep a man's dick super hard. Just being skinny is no guarantee of endless erections.
In my own personal case, I've been 140lbs most of my life, and the heaviest I've gotten is 170lbs (on a 5ft. 11in frame). I suffered a heart attack five years ago. I have NEVER smokes, NEVER drank to excess, NEVER did illegal drugs of any kind, and walked 45 minutes twice a day for almost two years prior to my heart attack. I always ate very well (lots of fruits and veggies), and NEVER ate high fat foods or high sugar foods. Yet, once I had my stents put in and on a drug regimen, ED seemed to be here to stay.
Now, having said that, I would recommend to anyone reading this to pick up a book by Dr. Steven Lamm, called "The Hardness Factor". I'm about halfway through it, and intend to follow it to the letter to see if it helps. To me, it all makes perfect sense. Even prior to reading this book, I found many articles which would back up what this doctor is saying.
One thing which I'd like to make clear is that ED is often like the proverbial canary in the coal mine. Signs of ED are often your body's way of telling you that you're developing heart disease. This is why I'm so angry at regular doctors. All they want to do is fix problems using a band-aid solution. They never get to the heart of the matter (pun intended). Penile arteries are some of the smallest ones in your body, and when they start being blocked, the quality of your erections start to suffer. Doctors hand out those little blue pills like candy, and a certain group of men love the idea of popping a pill to get their hard-ons back. The fact is, they are putting off the inevitable day when all of this will come to roost. The doctors will be more than happy to perform surgery on you, hand you all kinds of wonderful pills (statins, BP meds) and they will keep you in the dark on how these medicines can further kill your erections. They will hand out platitudes like, "well, you're not a spring chicken any more", or "well, you can try these pills", leaving you frustrated and depressed, which will only leave your dick that much more limp.
Anyway, once I start the process of following Dr. Lamm's program, I'll let you know how well it is working for me. I have a long list of medical issues (again, not brought on by my lifestyle, but rather poor genetics) so I may not have the same success as a regular man without all those complications.
You can also find Dr. Lamm's numerous videos on YouTube, which covers some of the bases I've discussed here.