What will it do:

allow the testicles to hang down from the body and improves the health of the testicles

stretching the skin of the scrotum, gently and over time, allows the skin to expand and the testicles to hang down within it, also the stimulation of the scrotum improves the circulation

Lie down flat on your back or stand upright. Part your legs. Massage your scrotum gently until the skin is loose and flexible.

With both hands, reach under the scrotum and place the tips of the fingers together on your body, at the point between the scrotum and the anus.

Push upward, and slide the hands forward, pushing the scrotum forward and upward until you feel a good stretch. BE CAREFUL not to compress the testicles in the process, as that will hurt. You will see the testicles pushed tightly against the inside of the scrotum; that's what you want to happen.

Do this stretch and hold it for thirty seconds. Repeat this twice a day.

You'll find that right after you do this exercise your testicles will hang down quite nicely. Repeating it over time will increase this sensation.