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Hahaha, well, as long as it's the cursor that he loves to chase and not your eyeballs, I guess everything will be fine. :D

lol, he has this thing about rubbing up against my reading glasses, he tries biting them then I'll get a bit worried.

Then, I think you probably are gonna need to buy him a heap of more bags of catnip. Just to save the integrity and life of your reading glasses. LoL