Mr. Cat asks whether Kaeloo is a boy or a girl. Given the fact that he is attracted to her, he's probably trying to figure out his sexuality.
Fridge Horror
Eugly chooses Quack Quack over Bad Kaeloo. If she had chosen Bad Kaeloo instead, Mr. Cat's Crazy Jealous Guy tendencies would probably push him to do something horrible to Eugly to get her out of the way...
Kaeloo reveals that Bad Kaeloo is a manifestation of her own subconscious expressing itself, which means that Kaeloo has a subconscious desire to hurt Mr. Cat in the most violent, horrific ways possible.
