This is it, the elephant in the gay sex room. So many people, gay and straight do their best to avoid talking about digestion and bowel movements in a serious manner. Yes, jokes are almost constantly told but most have no real idea how all of these systems work to help us to actually stay alive.
Knowing your body well has great advantages in detecting illnesses and diseases early, this includes testicular cancer. From jerking off, to shower time, getting to know your balls is one of the best things you can do for your health.