"This foray into looking at humans as creatures that are governed by instinct and biology offered little in the way of advancing Darwinist theory..."

"... nor was his explicit approach of studying man as a mere ape a novel one. What ensured the popularity of The Naked Ape was first its clarity of prose, and second, the era in which it was published, where a popularised 'back to nature' philosophy and sexual liberation were all the rage.... [T]he salacious manner of the book helped to guarantee it success. During copulation, he wrote, 'the female breasts … shows a significant increase in size. By the time orgasm has been reached, the breast of the average female will have increased by anything up to 25 per cent of its normal dimensions. It becomes firmer, more rounded and more protuberant.' Elsewhere, Morris would tell readers that the human penis is the largest of all primates, and the only one without a bone, making it harder to achieve an erection.... The Naked Woman (2004) was a similar blend of zoological observation and detailed titillation, with an analysis of women’s backs ('even at rest … naturally more arched than a man’s back'), legs ('part of the sexual fascination … is that they focus attention on the point where they meet'), buttocks (they 'transmit a powerful gender signal') and breasts (which 'operate first as visual stimuli and then as tactile ones'). Never short of ideas, Morris also advanced the theory that female breasts had developed as imitation buttocks 'to shift the interest of the male to the front.'..."

From "Desmond Morris obituary: natural world expert/Zoologist, broadcaster and author best known for The Naked Ape dies aged 98" (London Times).