1.   The range of mating systems shown by the dunnock probably reflects the differences in the interests of males and females.

2.   There are many different kinds of mating systems in the various species of animals.

3.   Baker, however, is ahead of most primatologists, who see a clear distinction between human and chimpanzee mating systems.

4.   So is sperm competition a feature of the human mating system, at least in the evolutionary past if not now?

5.   We have inherited our own version of the primate mating system, one in which both sexes possess an inclination to monogamy that falls somewhat short of total embrace.