A man can not control his testis. Testicles are not controlled by thought.
First of all women does not have testis aka testicles. And a man can not insert his testicles into a woman's vagina.
The muscle that covers the testis and the spermatic cord is called the "cremaster muscle".
They are called testicles (two) or testis (one).
It is not likely to happen.
When a male has one testis from surgery, injury, or congenital, he is able to have children. There could be a few issues with infertility, but one testis does produce enough sperm for a child to be conceived.
In a male, the testis have several important roles. Probably the most important thing the testis do is make sperm, allowing us to reproduce and continue the species. Another thing the testis does is release testosterone which converts the androgynous physique of a child into the masculine one of a man, with a larger muscle mass. Testosterone is also one of the hormones that causes the changes of puberty and secondary sexual characteristics which signal to women that they are able to father children.
The Vas Deferens.
It depends on the injury. Please add more information and ask again.
Yes
because the right one produces milk and the left one produces yogurt.
Testis