At first sight, it is surprising that religion has been so successful, but its extreme potency is simply a measure of the strength of our fundamental… - Desmond Morris

As a zoologist I cannot discuss sexual ‘peculiarities’ in the usual moralistic way. I can only apply anything like a biological morality in terms of population success and failure. If certain sexual patterns interfere with reproductive success, then they can genuinely be referred to as biologically unsound. Such groups as monks, nuns, long-term spinsters and bachelors and permanent homosexuals are all, in a reproductive sense, aberrant. Society has bred them, but they have failed to return the compliment. Equally, however, it should be realized that an active homosexual is no more reproductively aberrant than a monk. It must also be said that no sexual practice, no matter how disgusting and obscene it may appear to the members of a particular culture, can be criticized biologically providing it does not hinder general reproductive success.

[On The Naked Ape] His consistent failure to understand the impact of patriarchy and female repression bordered on the bizarre. He claimed that humans developed the loving pair bond to assure males their partners wouldn't stray while they were off hunting. Females evolved to be faithful. But a few pages later he mentioned chastity belts and female genital mutilation as means of forcibly keeping women virginal.

Despite our grandiose ideas and our lofty self-conceits, we are still humble animals, subject to all the basic laws of animal behaviour. Long before our populations reach the levels envisaged above we shall have broken so many of the rules that govern our biological nature that we shall have collapsed as a dominant species. We tend to suffer from a strange complacency that this can never happen, that there is something special about this, that we are somehow above biological control. But we are not. Many exciting species have become extinct in the past and we are no exception. Sooner or later we shall go, and make way for something else. If it is to be later rather than sooner, then we must take a long, hard look at ourselves as biological specimens and gain some understanding of our limitations.