The Naked Man by Desmond Morris

In this book, a sequel to The Naked Woman, and a descendant of his most famous book, The Naked Ape, Morris tells us interesting stuff about the human male. In ancient times, the need to hunt made this creature more "single-minded", and also leaner, than his female counterparts. He has two main mating strategies — pair-bonding, and its counterpart, "pair-bond disruption", which is easier to achieve in modern societies. His hair falls out in different ways — there is the Widow's Peak, the Monk's Patch, and the Naked Crown. Human penises, he tells us, are "most unusual", and also come in three main types — the Blunt Type, the Bottle Type, and the Prow Type, which bends upwards, possibly in the hope of connecting to a G-spot.

Synopsis by Foyles.co.uk

No life form has had a greater impact upon this planet than the human male. What is it that has made his legacy so utterly distinct from that of all other life forms, including even the human female? Following on from the international success of "The Naked Woman", Desmond Morris investigates this intriguing evolutionary success story. "The Naked Man" is a study of the masculine body from head to toe, examining biological features of the male anatomy in illuminating detail and describing the many ways in which these features have been modified, suppressed, or exaggerated by local customs and changes in social fashions. This is a natural history of man, viewing him as a fascinating specimen of a far from rare, but nevertheless endangered species. As with its companion title, "The Naked Man" is written from a zoologist's perspective and packed full of scientific fact, engaging anecdote and thought-provoking conclusions, including a controversial chapter examining male sexuality.