Scrotal stretching is permanent or temporary stretching of the scrotum
-- The practice commonly known in many circles as 'ball stretching' is where an individual stretches his scrotum to hang lower than it normally would. As with other stretchings, scrotum stretching is often semi-permanent, meaning the scrotum can end up returning to near its normal length unless steps are taken to stop it and maintain the modification.
As far as the maxuimum lengths, that is unknown. Well over a foot is very possible -- there are numerous examples of people who have stretched to this extent. Genesis P. Orridge talked about someone who stretched his scrotum to his knees in Modern Primitives.
One of the major risks is basic trauma to the testes and spermatazoa. Using too much weight too quickly, or even just handling weights roughly or carelessly can cause trauma.
Trauma-associated injuries include broken blood vessels, bruises, and the like, however, permanent damage can be done.
A more likely risk is skin irritation.
Different materials can irritate the skin of the scrotum, and different implements used for the purpose can hinder proper cleaning of the area.
Damage can also be caused when circulation is cut off from the area. A stretching enthusiast should always note the temperature of his scrotum, and remove anything which makes it feel colder than normal, as this is a sign that the circulation is restricted.
Different methods for stretching include a weighted leather "bull" bag worn around the testicles, leather straps to keep the scrotum from drawing up, steel rings and collars, vacuum pumping, or saline infusion into the scrotum to stretches the skin.
Most of the these items can be found in leather stores. | 
