Sid had mousie until recently (yeah, a catnip mouse: a green floral thing with a pink fluffy tail with a bell on it. Best!Toy!Ever! - until my lodger's greyhound tore it to pieces). Since then Sid, clearly from sentiment, has been glued to the catnip-flavoured patch of carpet, although I did vaccuum.

>and then he sits on it. Mightily.

Like the Groke (sp?) in the Moomintroll books, which occasionally sat on small creatures, and squashed them.