Or petting a cat. Or allowing a cat into their bed. Or sleeping on a couch that an infections cat has climbed onto. Or the cat walks across the dinner table or

Or petting a cat. Or allowing a cat into their bed. Or sleeping on a couch that an infections cat has climbed onto. Or the cat walks across the dinner table or kitchen counter. You seem to have a really wrong mental model of how fecal-oral transmission happens. If I have Norwalk (Norovirus) someone else doesn't need to literally lick my butt or eat my feces to get it. If I wandered around their apartment naked (interesting image) and sat on or walked across random pieces of furniture, they'd be very likely to get it.