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.
In many parts of the world, scientists and fertility doctors are noticing a drop in sperm count and sperm motility (sperm movement), which make it harder for couples to have babies. A recent study in France, for example, estimated that for a 35-year-old man, sperm concentration dropped from 73.6 million per milliliter in January 1989 to 49.9 million/ml in December 2005. Here are some of the possible causes of this phenomenon: