Well these buttergolems have basically replaced their blood with soda which both fucks up your immunesystem and feeds any germs that might infect you. Not to mention that someone with no feelings beneath the waist and unable to wipe their own ass won't notice/clean horrible wounds on their legs. Especially not if it's hidden in some roll and they're already in chronic pain due to fat some more pain wont register until its too late. Also, anyone who is fat does by definition not care about themselves or their bodies.