I think it's because fats don't have normal, healthy bowel movements like shitlords/ladies do. Someone with a healthy diet and body that functions properly because of it can expect their shits to be regular, unlike these loose diarrhea shit bombs that seem to catch these beetus monsters by surprise every time. I know a fat who claims to be both lactose intolerant and sensitive to beef, but this fat fuck still eats greasy cheeseburgers and just waits for the inevitable gastro disaster. Could be anywhere from 5 minutes to an hour for this to take effect, but if it ate this cheeseburger at a restaurant (never orders healthy, of course) everyone has to wait until it shits out it's meal in the restaurant bathroom before it's safe to leave. Even the ones who at some level know the cause and effect think the grease and the beetus is worth it. I can't wrap my head around it.