Actually.. as far as I know. Only testosterone level can change it's size. Or real damages. Some pretend shrinkage is possible, and lasts on them with chastity while not being too tight.. but yes maybe on some people : exactly like some are more sensible to phytoestrogens than others.. but the key point is that these people, confirmed to see a change after years of chastity... after years.. at 35+ your testosterone level is indeed not the same as at 25.. ;-) stress, smokes/smoking.. life has an impact on your body. But genetics is a thing. Your feet do not grow if you not wear shoes for all the Summer
Same as rest of your body. But yes some people are a bit different. So maybe. You can be receptive to drugs, food, more than others. Wish you luck