This is necessary because it makes it easier for the penis to be inserted into a female vagina during sexual intercourse.
erection
It is called an erection.
This process is known as an erection. It is primarily caused by increased blood flow to the erectile tissue in the penis, specifically the corpora cavernosa. When sexually aroused, the arteries leading to the penis dilate, allowing more blood to flow in and fill the spongy tissue, resulting in a firm and enlarged penis.
An erection occurs when the penis becomes engorged with blood. If you take a cold shower, one of the body's natural reactions is to bring most of its blood towards the core, thus causing the blood to leave the penis.
in an engorged erect penis - seriously
Labia minora become engorged with blood when sexually arousal, more often caused by clitoral stimulation and arousal. Arousal stimulates vaginal secretions that lubricate the labia for easier entry. Large labia minora can increase stimulation and friction on the penis during thrusting, increasing arousal of the penis.
An erection is when the Penis becomes engorged with blood which has the effect of making it much longer thicker and harder. The result being that it can then be pushed into a woman's vagina prior to an ejaculation which is required to fertilize her ovum
When you become sexually aroused, your penis fills with blood, making it big or erect
Most mammals have a bone, called a baculum, in their penis. Dogs, cats, rodents, marine mammals, primates, etc. Humans do not have a baculum. This makes it necessary for the penis to become engorged with blood in order to copulate.
Blood pressure medication does cause problem blood flow to the penis which create problems for erection, high blood pressure can cause sexual dysfunction.
Dude, they have to take blood out of your penis with a needle.. Go to your doctor, you can become blind with not enough blood to your eyes, i am serious.
It has to do with what the man/boy finds arousing, but sometimes an erection can happen spontaneously for a reason I cannot fathom (possibly a change in heart rate or some other circulatory issue). It is also a good way to experiment finding out what arouses a person. The smooth muscles in the arterial walls relax when nitric oxide is released, at which time the vessels dilate, blood flow increases, the vascular channels become engorged with blood, and erection of the penis occurs.