Actually it is the scrotum that is wrinkly and not the testicles. The testicles are the two egg shaped organs that hang inside the scrotum.
The job of the testicles is to make sperm and the job of the scrotum is to modulate the temperature of the testicles so that the production of sperm is optimal. In order to do this the scrotum can relax and cool the testicles by allowing them to be farther from the body, or it can contract to bring them closer to the body, thus warming them up. The reason for the wrinkles is that the skin must be long enough to cover it while it is fully relaxed, and when it contracts partially the skin bunches up and has wrinkles. If you notice, your scrotum probably has less wrinkles after you get out of a hot bath or shower. This is because the scrotum has relaxed because the testicles are warm.
You cannot "grow" testicles. But if you are male you should have testicles and they will develop as you grow.
A male's testicles are found underneath the tail, right under the anus. In an intact and mature male, the testicles are very pronounced. If the cat is neutered, then the testicles will not be apparent, but will be a gap between the anus and penis where the testicles once were.
The average young male donkey will drop his testicles shortly after birth. The testicles will drop down with them 24 hours of birth.
No, rats have intercourse to have babies, and there are both male and female rats.
Caponization is the surgical removal of the male testicles or the hormonal remission of the testicles using an estrogen implant. So the answer is, yes, only male chickens are caponized.
The Male Gametes are formed in the testicles.
testicles
He's nuettered so where would the Boys be comming from?
Penis or testicles
They are testicles on male cats.
Haemaphrodite
A human male without testicles.