i have no evidence but research show when chimps win a power struggle and become the alpha their balls get larger while the chimps who lose the power struggle and become betas have their balls get smaller

it was suggested this is due to status but logically i would assume alphas get more sex so you may be shrinking your balls by never using them ... 

 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 ...