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.
If your guy does something that overheats his testicles, it can interfere with sperm production. So he should limit the time he spends in hot tubs, saunas, and steam rooms. Dr. Mazzullo recommends that men keep it to 15 minutes, no more than twice a week. He may want to change his laptop habits, too.