From the time we are young, we experience erections.
It is a natural occurrence and aside from the occasional embarrassing situation, most of us accept them for what they are.
Even though we may have them regularly, however, we likely don’t realize what causes them.
The truth might just surprise you.
First of all, an erection doesn’t start in the penis, it starts in the brain.
Due to some type of stimulation, such as something we see, hear, smell or feel, our brain starts sending out signals.
Those signals come in the form of chemical messengers and they let our body know that it is time to have an erection.
At that point, things actually start taking place in the penis.
There are two main vessels in the penis, one that carries blood into the area and another that carries it out.
Because of the chemical messengers in the brain, the penis starts retaining blood and becomes engorged.
It is only after the stimulation passes or ejaculation occurs that the blood begins to be released from the penis.
So the next time you have an erection, stop to think of how your brain played a part in it.