How Men Work, When It Comes to Sex

The science behind orgasms for men.

The Science of Sex

Men’s sexual organs are biologically different from other species. A man’s penis doesn’t have a bone. Why? The bone makes for fast and easy access in the animal kingdom, allowing quick insemination--a feature we can't imagine women being too thrilled with! Human males, in exchange, gain a disproportionately large penis for their body.

How Men Work, When It Comes to Sex


The testes are filled with tubules, which begin to narrow at age 50, reducing sperm production. However, sperm don’t lose their viability. The oldest father on record is 94!

The evolutionary implications: Men use their penis as a tool of attraction, implying that women place some value on it when determining a potential mate. Clearly, this is not as overt these days. Secondly, the lack of bone shows that men do equate emotions with sex. They must be aroused for an erection. Fast-and-easy access can be painful for females. Fortunately, today’s men require a lot more care to have a sexual relationship.

Another interesting body observation: Humans have proportionately smaller testicles than males of other species. Human males don’t need this huge size because of a biological drive to be monogamous.

QUIZ: Sexual Satisfaction

Now, it doesn’t take a sexologist to discover the purpose of the male orgasm. Find the egg, fertilize it, then start shopping for Barbies. But, it’s not always this simple. Some sperm block other sperm from fertilizing the egg.

Like females, during a man’s orgasm, muscles are contracting like crazy. The purpose of these contractions is to enable the penis to penetrate as deeply as possible. The prostate glands squeeze repeatedly, propelling sperm as far as possible. The prostate is sometimes called the male G-spot. It’s made of some of the same tissue types as those around the nerve plexus (G-spot in women). You can stimulate it in a similar fashion (with the come hither gesture).

Normally, ejaculation propels semen through a man’s urethra, out of the tip of the penis. Side note: the semen contains feel-good hormones like oxytocin. Some men experience retrograde ejaculation, where a tiny muscle does not properly keep the semen from backtracking into the bladder. This could be a side effect of medicine or surgery. While this doesn’t prevent a man from achieving an erection or ejaculating, it may hinder his fertility.

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