i’d venture to make the assumption that there’s more going on there than base chemical reaction in the brain and body induced merely by orgasm alone.
well you know also on steroid cycle balls get smaller and then when you do HCG therapy https://en.wikipedia.org/wiki/Human_chorionic_gonadotropin they get bigger again ... in fact they get freakishly big if you stop using an organ as far as i am concerned you should be willing to accept that it may never work again ...