“He may well build other nests, which he will display to any female who enters his territory. If she likes any of his pads she will move in, decorate, and bear his children. A slapper seeking a Premier League husband could not be more shallow. Mind you, he is no moral giant. As soon as he has ensconced one female, he will try to tempt another Jenny Wren into one of his spare nests, where she too will give birth to his progeny. The little cock then travels between his families, a bigamous commercial traveller in a 1930s thriller.”