When out on the town, women often head for the ladies’ room together. It’s a scene we’ve seen played out in countless movies and television sitcoms. But it happens in my home as well. My three cats, all females, seem to most enjoy using their litter boxes when I am in the bathroom. And according to new research by scientists at the University of Messina’s Faculty of Veterinary Medicine, they aren’t stalkers, they’re copycats.