Why is Sex Fun? Book Summary - Why is Sex Fun? Book explained in key points
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Why is Sex Fun? summary

Jared Diamond

The Evolution of Human Sexuality

3.7 (177 ratings)
17 mins

Brief summary

'Why is Sex Fun?' by Jared Diamond answers the most fundamental questions about sex through scientific insights and evolutionary theory. The book explores how sexual reproduction evolved, why it's pleasurable, and why humans have sex for more than just reproduction.

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    Why is Sex Fun?
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    Human beings have the weirdest sex lives of all animals.

    If your dog could tell you what it thought about your sex life, it would probably say it was shocking and downright bizarre.

    For starters, it would be horrified that you have sex on any given day of the month, even just after a female partner has had her period. It would also express utter confusion as to why humans bother having sex when the female is already pregnant.

    Furthermore, it would ask why on earth you choose to have sex behind closed doors instead of doing it in front of other humans like any normal, healthy dog would!

    It turns out that human standards for sex are not shared by any other animal.

    Really, if you think your pet’s sexual behavior is odd, think again – it’s our sex lives that are weird. Just consider the thirty million other animal species that don’t do it the way we do!

    Even when we narrow the scope to the 4,300 other mammal species on the planet, our habits seem rather strange. For instance, mammals such as lions, wolves and chimpanzees normally copulate publicly. They don’t pair off, nor do they live like a nuclear family. Instead, both the adult males and females are solitary beings and only meet up with one another in order to copulate.

    Just as with posture and brain size, human sexuality also differs from that of our closest relatives, the great apes – primarily Africa's chimpanzees and bonobos.

    Whereas posture and brain size aided us evolutionarily speaking, and contributed to our dominating other animal species, what about our strange sexuality? How does it make evolutionary sense? As we’ll see later on, our sexual habits, like monogamy, actually contribute to the survival of our species.

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    What is Why is Sex Fun? about?

    Everybody thinks about sex. However, we seldom consider the extent to which human sexuality differs from the reproductive habits of other species. In Why is Sex Fun? (1998), Jared Diamond presents an exploration of humans’ sexual history, and explains how our unusual sexual behavior might be the reason we ascended to the top of the food chain.

    This is a Blinkist staff pick

    “This curious look into human sexual behaviors is a great read for anyone wanting to gain a deeper understanding of, for example, why we can flip from hot under the collar to “not tonight, honey,” in a flash.”

    – Julian, Customer Support

    Why is Sex Fun? Review

    Why is Sex Fun? (1997) explores the evolutionary origins and purposes of human sexuality. Here's why you should read it:

    • Using scientific research, Jared Diamond presents a fascinating insight into the biological, cultural, and psychological aspects of human sexuality.
    • The book challenges common misconceptions about sex and provides insights on reproductive strategies, sexual selection, and the role of pleasure, making it an engaging and enlightening read.
    • With a blend of humor and science, Diamond conveys complex ideas in a relatable and amusing way, ensuring that the book is never dull.

    Who should read Why is Sex Fun??

    • Anyone wondering about the differences between animal and human sexuality
    • Anyone curious about our sexual evolution

    About the Author

    Jared Diamond is a professor of geography at the University of California, Los Angeles. A Pulitzer Prize winner for his bestselling novel Guns, Germs, and Steel, Diamond has also been awarded the National Medal of Science and a MacArthur Foundation Fellowship.

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    Why is Sex Fun? FAQs 

    What is the main message of Why is Sex Fun?

    Why is Sex Fun? explores the evolutionary and cultural reasons behind the pleasures of sex.

    How long does it take to read Why is Sex Fun?

    The reading time for Why is Sex Fun? varies, but the Blinkist summary can be read in just 15 minutes.

    Is Why is Sex Fun? a good book? Is it worth reading?

    Why is Sex Fun? is worth reading for its insightful exploration of the evolutionary aspects of sex.

    Who is the author of Why is Sex Fun?

    Jared Diamond is the author of Why is Sex Fun?.