There are two correct plural terms for “penis”: “penises” and “penes.”

Penises get smaller if you smoke. Smoking calcifies blood vessels, constricting blood flow and making members shrink up to 1 centimeter.

Babies can get boners in the womb.

So can corpses. Not in the womb. Just after…well you get it. “Die Hard,” Yah that just happened.

Good-looking men have stronger sperm. During a study in Spain women were shown pictures of men and asked to rank them according to their attractiveness. The men that the women found to be the best looking were most often the best sperm producers.

The largest penis in the world is 13.5 inches.

Statistically speaking, men’s dissatisfaction with their penis size has nothing to do with the size of their penis. 30% of men are unhappy with the size of their penis (compared to 35% who are satisfied with their dick size) and those 30% are not necessarily those with smaller members.

Shoe size does not determine penis size.

Diet affects the taste of semen, and asparagus isn’t the worst offender. Turns out red meat and dairy are the worst foods to eat if you want your sperm to taste okay. They make the situation taste saltier and generally less palatable.

Doctors can grow skin grafts for burn victims out of the foreskin of circumcised infants. “One foreskin can produce 23,000 square meters, which would be enough to tarp every Major League infield with human flesh.” Hooray for science…and for that visual!

The penis’s sensitivity declines with age, beginning at around the 25th year. Doctors say that older men are far more likely to complain of erectile dysfunction and difficulty ejaculating than the loss of sensitivity to their member.

Penises are twice as long as you think they are. According to MRI imaging, half of a man’s penis is actually inside of his body. The full dick is a boomerang shape when having sex in the missionary position.

A man ejaculates an average of 7,200 times during his lifetime.

According to a global 2007 World Health Organization survey, 30% of men over the age of 15 are circumcised. Approximately 80% of American men, however, are circumcised. America’s obsession with circumcision began in the 19th century as a way to try to prevent masturbation.

King Louis XVI of France helped make circumcision trendy.

Semen is low in calories. A teaspoon of semen has been found to have anywhere between 5 to 25 calories per serving. It’s comprised of citric acid, amino acids, fructose, enzymes, and water.

A man has, on average, 11 erections per 24-hour period.

One testicle hangs lower than the other so that they don’t hit together.

On average, intercourse lasts 2 minutes and 50 seconds.

On average, there are at least 100 million acts of sexual intercourse each day.

Germany gets the most penis enlargement procedures in the world.

There are, indeed, two types of penises: show-ers and growers. “Grower” penises elongate and expand when getting an erection, while “show-ers” remain relatively the same size when flaccid or erect. According to a Men’s Healthinternational survey, 79% of men report that they are “growers” whereas 21% are “showers.”