I have been known to post here under a real pseudonym, but prefer to deal with this issue anomynously.
I'm pushing 60 and not particularly slender. About a year ago one of my testicles started to grow. No physical discomfort or other negative indications, just bigger. Scanning the net made me fear the worst so I beat it to a urologist who ordered ultrasound of the boys and the kidneys, then dismissed the condition as (apparently) not a problem. Now that the thing is the size of my fist it seems to have stopped growing.
But there is a problem in re riding. Having a big one does keep it from being squashed between saddle nose and thighbone, but now I can't lean forward very far without squashing it between saddle and abdomen.
If this is a normal condition for older men, has anyone else experienced it? and what can be done (short of castration, that is.. )?