Firstly, thank-you to the OP. It seems that people are more willing to talk-about-not-talking-about-it than they are willing-to-talk-about-it. If that makes sense?
As a sufferer, I have read about this issue in various other forums. What I notice is that in forums for say, bodybuilding, they appear to be very open about discussing it. Perhaps because they are aware that of the sacrifices they are making (large muscle gains in exchange for lower libido and ED). By contrast, those with diabetes are not making a choice. Nobody chooses to get diabetes. It's not voluntary. Therefore, the sense of unity and comradery is somewhat diminished.
Additionally, as a young(ish) man I find it difficult to discuss issues such as these with more senior gentlemen who readily admit that it rarely bothers them. It bothers me and I know it bothers my GF even more. So again, I think there is a lack of 'common ground' where discussion is concerned.
Finally, I think that it is difficult to compare notes given the huge range of options and treatments available. I have read numerous things about Viagra, Cialis, Tren and more but there seems to be very little consensus about the "right" treatment. I noticed another poster here recommending Sidenafil but reviews I've seen don't rate it all. I guess because of things like this people are reluctant to advise others on such an intimate issue.
Well anyway, that's my input I'd welcome others opinions.