We don't have any cats who sit on the toilet seat, but ours do occasionally mistake the toilet for their water dish. Chloe, however, does like to sit with me while I put on my makeup. In our previous houses, she would sit right in front of me on the vanity. (She is also a "people climber", so I usually ended up having to put her out of the bathroom.--Not good to have a cat trying to climb onto your shoulder while you are applying mascara.) Our current parsonage is a little older, and we have sinks without vanities. Chloe now sits and watches from a shelf in the linen closet.