Why Is Sex Fun

Why Is Sex Fun takes a humorous look at the evolution of human sex life, explaining why the way we behave sexually is often odd, but necessary for our survival.

Compared to thirty million other animal species, we really are the “odd one out”. If your dog could talk, he’d probably pull you aside and tell you to get your sex life straight.

“How can you just randomly have sex on any day of the month? Even if the woman has just had her period. That’s gross!

And when you finally do get her pregnant, you STILL keep having sex. What’s that about?

Honestly, I don’t get any of this.

But the part that weirds me out the most is why you can’t just have sex in public, like any normal animal would do. What’s with all the dimmed lights, closed blinds, and secrecy?

I’m just glad I didn’t see you leave your socks on!”

Okay, that last part I made up. But even just comparing us to the 4,300 other mammal species on earth, these are still valid questions from your dog.

Whether you look at chimpanzees, wolves, lions, bears, birds, beavers, squirrels or kangaroos – they all mate only when the female is fertile, they do so wherever they want, and immediately stop having sex as soon as the female is pregnant.

Who’s the weirdo now?

This was a big lightbulb moment for me. The reason we randomly have sex is we simply don’t know when a woman is fertile.

Unlike other mammals, women show no obvious, exterior signs that they are fertile. Baboons can spot fertility from miles away (they are the ones with the red bums), deer make sounds to signal they’re ready and fish can pair their sperm and eggs any time, since they fertilize externally.

Diamond argues that concealed ovulation developed in order to promote monogamy. A man who leaves a woman shortly after sex might potentially put his offspring in danger, in case she’s pregnant.

Furthermore, since we can have sex any time, the desire to immediately find other fertile females becomes weaker. And even if males were to take off right after sex, they wouldn’t know how to spot, new fertile females anyway.

This is likely designed by evolution to keep us together, protect our children, and help them grow up.

So yeah, monogamy is what’s up!

The less fertile you are, the longer you live. Boom! Shocker, right? But it makes sense. Keeping up fertility in the form of cells, sperm and going through the reproduction cycle over and over again costs the body a lot of precious resources. Studies have found that male worms, who suffer from a mutation which…