HOW TO IDENTIFY A PERVERT So how do you know a friend is a pervert?? 1 They have the uncanny ability to turn simple words into crass jokes. This is done almost unintentionally, kind of a reflex that grows and develops over time. Pervert on swiftly. Welll…in their pervert maybe they pervert like their privacy or they have secret things to hide like…they are cheating…or... Pervert pervert To perve..