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Why does the human male stand out as one of the few mammals to stay (often or usually) with the female he impregnates, to help raise the children that he sired? There is no one better qualified than Jared Diamond,renowned expert in the fields of physiology and evolutionary biology and award-winning author,to explain the evolutionary forces that operated on our ancestors to make us sexually different.

A fascinating insight into how human sexuality came to be the way it is now - Jared Diamond explains why we are different from the animal kingdom.

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Human sexuality seems normal to us but it is bizarre by the standards of other animals.This image is of book cover(s), and the copyright for it is most likely owned either by the artist who created the cover(s) or the publisher of the book(s).It is believed that the use of low-resolution images of book covers qualifies as fair use under the Copyright law of the United States. The Evolution of Human Sexuality is a 1997 book about the evolutionary development of human sexuality by Jared Diamond. Diamond addresses some peculiar aspects of human sexuality.These include why women's ovulation is not overtly advertised; why humans have sex in private rather than in public, as Diamond claims is the case in all other mammals; and why the ovaries are U-shaped.