Most books on witchcraft will tell you that witches work naked. This is because most books on witchcraft were written by men.
Villager: We have found a witch, may we burn her? Crowd: Burn her! Sir Bedevere: But how do you know she's a witch? Peasant 3: Well, she turned me into a newt! Sir Bedevere: A newt? Peasant 3: ... I got better.