I don't have concrete solutions, but I can tell people from my experiences that when I have more sugar in my diet... whether it is from coffee, alcohol, soft drinks, or other foods that I have the problem much more often. If I cut out alcohol, coffee, soft drinks, and watch my diet... the problem doesn't completely go away, but it has become MUCH more -rare- and less intense.
So, I recommend.... at least trying to watch your diet for a couple of months and see if that helps.
But different people in the forums also have other ideas to try.
I am still looking for more concrete answers/solutions myself, but until then I am sticking with what seems to be helping me.
Well, alcohol irritates the urethra and bladder, so its not all that surprising that it would burn some after drinking.
Dehydration can also cause the same thing.
The only physical cause would be an inflamed prostate, and if you haven't had a prostate exam, it might be a good idea, at least to rule it out.
Its not an std, though. You might get more ideas in the men's health forum.
Aj