1. You need to have erections regularly to keep your penis in shape. It has to be essentially exercised. This form one of the basic facts about the penis you do not know.
To maintain a healthy tone, the smooth muscle of the penis must be periodically enriched with oxygen by the rush of blood that engorges the penis and makes it erect.
If a guy is physically able to get erect, but never has erections during the day — maybe he finds himself in very un-erotic circumstances for a long time — he needn’t worry. The brain has automatic penis maintenance function in-built.
Nerve impulses from the brain cause erections during the dreaming phase of sleep, called the REM (Rapid eye movement) phase. It does not matter if you are having sex-dream or a nightmare — your penis gets hard during that period of the sleep cycle.
But some men are physically unable to get erections, such as those who have suffered trauma to the nerves involved or who have nerve or blood vessel damage caused by diabetes.
- You can not presume exactly the size of penis.
There’s no consistent relationship between the size of a flaccid penis and its full, erect length. You might think that a guy with a big penis when it is flaccid will have a gigantic penis once it’s erect, but that may not be true.
In one research study, researchers found that out of 100 men, increase from flaccid to erect lengths ranged widely, from less than a quarter-inch to 3.5 inches longer.
A penis that doesn’t gain much length with an erection is known as a “shower,” and a penis that gains a lot of length with an erection is called a “grower.” Most penises are not extreme showers or growers.
- Penis can break.
This is the truth your doctor may not tell you and your gym instructor might also not tell you. Penis can actually break, despite not being made of bone. Vigorous intercourse or masturbation—or even falling on an erect penis—can cause a penile fracture. It’s a bending injury that occurs when a membrane called the tunica albuginea tears. The tunica albuginea is what surrounds the corpora cavernosa, which is the spongy tissue inside the penis that fills up with blood during an erection. When the membrane tears, the blood that’s normally confined to this space leaks out into other tissues, causing bruising and swelling. Recovering from a fracture usually involves stitches and takes long time.
- The pleasure zone
Many men consider the underside of the glans (head) of the penis and the underside of the shaft to be most sensitive to sexual pleasure.
The underside of the glans and underside of the shaft had the highest sensitivity rating for a significant majority of men, followed by the upper side of the glans, left and right sides of the glans, sides of the penis, upper side of the shaft, and foreskin (for the minority of men who were uncircumcised).
- Penis can shrink.
Penises really can shrink—for several reasons. Smoking is one way: It can shorten a penis by as much as a centimeter because of calcified blood vessels that reduce erectile circulation. Also, penile tissue can become less elastic if a guy doesn’t get regular erections, meaning his penis could shrink by a centimeter or two if he doesn’t use it enough.
- There is more to semen than just sperm.
Semen is made of about 96 percent water, 2 percent sperm, fructose (which nourishes sperm), vitamin C (which helps keep sperm healthy), sodium bicarbonate (which protects sperm from the acidic environment of a vagina), various proteins and enzymes, and minerals like magnesium, phosphorus, potassium and zinc.
- The average male orgasm lasts 6 seconds.
Under normal circumstances, it does not take very long for a guy to finish his orgasm. Women, on the other hand, have orgasms that last for an average of 23 seconds or less.
- Most men are not circumcised. Believe it or not, only about 30 percent of men age 15 and older are circumcised worldwide. In the United States, more than half of newborn boys are circumcised in the hospital—about 58 percent.
- There is more to it than you think.
A guy’s penis size is double the length you actually see. The rest is tucked up inside the pelvis and attached to his pubic bone.
- Guys are basically constantly turned on, like, all the time. The average man has 11 erections during the day and 9 at night. The average man will also ejaculate 3600 times in 18 months healthily. That would be like approximately 6 times a day.
- Sensitivity Declines with Age.
Studies show that the penis steadily loses sensitivity as men age though it’s hard to say exactly by how much. That’s because different researchers have used different ways to stimulate the penis and measure sensitivity.
In general, the sensitivity of the penis is gauged by the least amount of stimulation a man is able to feel. That is called the “sensory threshold.”
Despite differences between studies, the data show a clear trend when taken together. From age 25 on, sensitivity starts to decline. The sharpest decline in sensitivity is seen between age 65 and 75.
What is less clear is whether men really encounter a total loss of sensitivity as they come of very late age.
Kohler says that if old men are really aware of it, his patients seldom mention it.
“It is a super-rare complaint,” he says. “On the other hand, difficulty with erections and difficulty achieving ejaculation are much more common.”