Cut your bought or home grown spring onions about 3cm (1in) above the root. Use the leaves in cooking and add the stem/roots to a glass with clean water to rehydrate roots. Change water daily & keep in a well lit position such as a windowsill or kitchen bench. Watch green leaves regrow.
Basically, a hard thwack to the balls would do the trick.   Also, a man could stop producing sperm because â¦of a hormone imbalance, especially age related.     Men never stop making spermatazoa after the onset of puberty, as long as their testicles remain intact.
However, there is a vast difference between older and younger men in the number of late (or mature) sperm cells.. What Age Does to Sperm Research is exploring many of the whys and hows of decreased sperm production and maturity with age. As a result, many explanations have been uncovered. Men experience an age-related decrease in testicular size and in sperm production, says Dr. Silber.