Testicles

Who else notices their testicles change in size? Sometimes mine are more firm and larger and other times they get in a weak form and smaller. I usually notice they are smaller when I am lying down. Anybody else notice this? Usually they are 1.75 inches long but will sometimes go down to 1.5 inches long

Not sure about testicles, but after one month of PE I would say my ball sack get bigger. And also probably hang lower.