Corrected entry: Throughout the movie there are times when monsters prefer cleanliness and times when they prefer dirtiness. Examples of monsters preferring cleanliness include Sulley brushing his teeth at the beginning of the film (Mike says "Fight that plaque.") and a little later on at 'Monsters Inc' when a green slug monster mops the floor. Examples of monsters preferring dirtiness include Roz reading a newspaper with an article at the back of it that says 'Gain pounds' and when Mike asks Sulley for oderant (smelly garbage, old dumpster, low tide, wet dog).
JackieN
14th Oct 2006
Correction: What, monsters can't like smelliness but want their teeth not to fall out and their feet not to stick to the floor? Characters sometimes choosing convenience (chewing food, walking easily) over an aesthetic preference is not a plot hole. (And don't even get me started about calling weight gain "dirty.").
JackieN