Why does everything seem to come in threes? Is it magic number? We have the Three Stooges; plants should be grouped in threes; the Holy Trinity; the three wise men, traffic lights – red, amber, green; clothes, especially for babies: one on, one off and one in the wash; pre-packed meat in supermarkets, chops always seem to be in threes, not one or two or even four … Click here to read on