Because the sperm are so small and have to travel so far to fertilise the egg many don't make it or die along the way. To ensure that they make it and fertilisation occurs the body then produces millions and millions of sperm; increasing the chances of fertilisation.
Testes ,ovaries
Males produce many things. They produce sperm as well as testosterone. They differ from women because women produce estrogen. Everyone produces immune system functions in their intestines.
Yes, but they have a lower sperm count.
Males produce sperm from the age of puberty throughout adult life.
It's in his best interests, speaking from the point of evolution. The more sperm that he produces, the greater the chance he has of fertilizing an egg and passing his genes along to the next generation.
sperm
Yes, they do, once they hit puberty.
Because you females need us to.
males produce sperm and females produce eggs
Yes, but this is exclusive only to males: only the boar bears produce sperm.
inability to produce healthy sperm and the production of too few sperm
They're born without sperm, they make sperm during puberty and then continue to produce sperm.