I’m pretty sure pumping increases the hang of the testicles automatically with regular use. That seems to be the case for me anyway.
My thoughts are that the pulling of the scrotum into the tube when starting a larger tube it stretch it out over time. The increase in scrotum length from this allows the testicles to hang lower and gradually lengthen their cords. There seems to be a correlation between dick size and the length the testicles hang as well, probably due to the warmth of the penis keeping the testicles dangling instead of retracted.
Or maybe my testicles are hanging lower from age. I don’t know, but I’d prefer they’d stop. Low hangers are attractive I think, but this is fast approaching ridiculous and briefs are so uncomfortable and stretch out of shape in a few days.
Starting: 7"bplx5.2" 2017 (shrunk from disuse)(originally 8"bplx4.5", gained to 9"bplx6")
Current: 9.0"bplx6.125" 2020
Goal: 11.5"bplx7" 2021.