The ideal place is between the cat's sleeping place and the feeding place because the cat often passes through these places when moving around its territory; thus, the toilet is on the way. A bedroom is a quiet place where you relax, but it is not suitable for the litter, only for your rest on the one hand, because of the smell; on the other hand, because of the disturbing noises that the cat makes cleaning its paws. Cats are known to be nocturnal and will sometimes defecate while you sleep.