The brain.lol
Erections form by having blood flowing through the penis.
Yes, it is normal for a 5 year old to get erections during the day. It is even normal for baby boys and toddlers to get erections.
They can do yes. These are called spontaneous erections or involuntary erections. They occur when blood suddenly rushes into the penis (erections are caused by blood flow into the penis). It's very common in men when they wake up in the mornings.
Physically healthy men experience several prolonged erections during sleep.
kids get random erections mainly during puberty because when you go through puberty you get more sexually active...so yes its normal...but it is also embarassing when they come at the wrong time...lol
because the blood flow to the penis is slower.
Yes they can. Erections are not only caused during sexual arousal. They can do it while scared, bored or excited.
no they die
Blood fills it up when u see a hot girl
no, not without testosterone injections. Hormones come from the testicles, so in order to have erections, it might be necessary to have alternative hormones therapy.
Viagra will increase blood flow to the penis, thus causing it to become erect.
it allows for quicker erections that last longer...much longer ;)