Why Testicles "Hanging" Outside The Body?

Why is it only the penis and scrotum that hang outside of the body?

The fragile internal organs of human beings
are all hidden in the body, protected by skin, bones and flesh
But the penis and scrotum are the only ones
hanging high between the legs
The penis is obviously convenient for sexual intercourse and easy to understand

but how about scrotum?
Is it better and more convenient to show glory?
Is it easy to stimulate increased sperm reproduction?
Is it easier to inseminate if it is closer to the penis?

Is it actually related to sperm?

The optimal reproductive temperature for sperm is 34-35°C, which is 2-3°C lower than human body temperature
And the "external" scrotum helps the eggs and sperm to "dissipate heat"
The temperature is maintained at an optimal level
If the eggs are inside the body, it will be too hot for the sperm

What if it's too hot?

When the temperature of the sperm environment rises to human body temperature
they will enter a "riot" state
as if receiving a message to swim into the uterus to fertilize the egg

The lifespan of sperm at body temperature is only 50 minutes to 4 hours
This is also the time it takes for sperm to completely enter the female reproductive system
So being in a body temperature environment for a long time is like boiling a frog in warm water
Slowly "Waste" the energy of sperm

Does the scrotum "automatically" adjust its temperature?

It turns out that the scrotum has a "testicular reflex" function to regulate temperature

When the ambient temperatureis too high, the scrotum willrelax
to allow the balls Stay away from the body to speed up heat dissipation

When the ambient temperature is too cold, the scrotum will tighten
to allow the balls to Close the body and insulate

In addition, the arteries and veins of the scrotum are close to each other
supplying blood and dissipating heat, which is an additional "cooling" system

Will underwear/pants that are too tight kill sperm?

3D baggy sure looks yummy, and tight jeans are sexy
But will they actually kill your sperm?

The eggs that are "forced into the corner" will affect their heat dissipation function
leading to an increase in the temperature of the egg environment
threaten the vitality of the sperm

That’s why I wear some loose-fitting breathable pants/unders which are the best~

Taking a very hot shower kill sperm?

It’s cold and windy outside. Want to take a scalding hot water/bubble bath?
It is really comfortable to think about, but it is recommended to avoid excessive temperature/long-term washing and soaking
Firstly, it is bad for sperm health
Secondly, it may be overly irritating to the private parts with thin skin and sensitive skin
thus causing discomfort

So don’t make it too hot/too hot~