Cold as/colder than a witch’s tit

Despite bogus attempts to attribute this saying to witch-hunts from centuries ago, where witch-hunters would look for tell-tale marks on witches’ breasts where supposedly demons or devils were suckled, this forceful metaphor for cold weather is first attested in America c.1930, but is now used extensively across the English-speaking world. It sometimes appears, more politely, as a witch’s teat. It may have been coined because of the known practice of witches to cavort about naked. In winter weather, this would inevitably result in cold breasts.