For boys, one of the first signs that puberty has begun is that their sexual organs begin to grow. Although the penis won't grow very much at first, one will notice that their testicles hang lower than before and seem larger. Also, the scrotum, the sac that holds the testicles, gets baggier and more wrinkled. The skin of the scrotal sac will feel different, and will turn a darker colour.
Soon the penis does start to grow, getting both wider and longer. The testicles continue to grow during this process, but not as noticeably as before. The colour of the penis and scrotum will turn a darker colour yet. You may notice that one testicle hangs a little lower than the other one. Nature does this to prevent one testicle from crushing the other when you walk. It is also possible that one of your testicles is larger than the other. This is also very common and just means that one has grown a little faster than the other.
When the pubic hairs start to grow, they make little raised white bumps on one's skin as they try to push through. If you didn't know what they were, you might think you had some kind of disease. It's also possible that you will find other bumps on the penis or scrotum that do not sprout hairs. These are also a natural development, and are sweat and oil glands.
While the penis and testicles are growing, things are happening inside as well. Each testicle has about 250 tiny compartments inside. Coiled up inside these compartments are tiny tubes no thicker than threads called tubules. Boys' bodies begin to make sperm inside these tubules, and in fact, make up a fresh batch each day, (millions a day!) every day for the rest of their lives. The testicles must be the right temperature to make sperm, which is a little cooler than your body temperature. This is why testicles hang down below the body instead of tucked up safely inside; to keep them cooler.
Although sperm are very tiny, (it would take at least 25 of them lined up end to end to measure one millimetre), they are alive and if you could see them under a microscope, they would look a lot like a tadpole.
After the sperm are manufactured, they move to a compartment attached to the testicle called the epididymis, which is also a coil of tubes. The sperm travel slowly through this coil of tubes for about five or six weeks, maturing into ripe sperm. Mature sperm travel out of the scrotum and up into your body through a tube called a sperm duct to be stored at the flared out end of the tube until such time as one ejaculates. Just before ejaculation, another compartment called the seminal vesicle releases a white, thick fluid that it produces called semen. Semen is extremely important to the sperm because it is the shot of energy they need to get themselves going.
THE PERFECT SNOWMAN - HEY, WHERE DID YOU GET THOSE?
FOUND THEM ON THE SNOWMAN.
YOU NEUTERED HIM!
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