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.
Boys start producing sperm in their semen once they have started puberty. It may take a while for the production to begin but it will have by the time puberty has ended. At first masturbation will produce a small amount of clear watery sticky fluid on ejaculation, this will be the Semen.