How Come There Are Bodyguard Type Suits In The Tiffany & Co. Jewelry Stores?

Have you ever walked into a Tiffany & Co. jewelry store and once you walk into the store there are men in suits standing one at the entrance/exit and others right in the middle of the store? Doesn’t it make some customers go uneasy because these suits in men make them feel intimidated like cops or person in authority? It’s like, you’re innocent and just went to the store to browse around, but you feel a slight uncomfyness because you know you are being watched sort of like a stalker, but not in that sense. What do you think? Please explain.