Clifford Longley’s Tablet column on Archbishop Nichols’ thoughts on the need to “explore” afresh issues of sexuality and homosexuality is to be heartily welcomed. However, as we consider the lessons (if any) from the “broad book of nature”, it is really important that we consider the broad book as found in empirical evidence, not the narrow book of theological imaginations. In his own reflection, Longley repeats the claim that “alone of mammals, humans engage in sexual intercourse irrespective of whether the female is fertile or not?”. This claim, that other mammals only engage in sexual intercourse when the female is fertile, is often made. It is however, entirely without foundation. This assertion is beloved of moralists, but it is as false as the other often made claim that homosexual activity is unique to humans.
Bruce Bagemihl, in Biological Exuberance, provides details of many hundreds of animal species, from all branches of the animal kingdom, which are recorded in the scientific literature as demonstrating some form of homosexual activity. For many of these, he also describes examples of non-procreative heterosexual intercourse.