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Step 1: Befriend the cat. This involves speaking to it in baby talk, rubbing it behind the ears and giving it kitty treats.
Step 2: Delve your evil mind into the wikipedia articles on Pavlovian conditioning.
Step 3: Become and evil genius and start laughing maniacally.
Step 4: Spend the next 1.5 hours walking up the steps calling for Paddington (the cat) and giving him a kitty treat when he follows you into the bathroom.
Step 5: Laugh your head off when ginger can’t figure out why Paddington always follows people up the steps and runs into the bathroom.

Yes ladies and gentleman, you too can hack a kitty cat. All you have to do is have a little patience, a box of kitty treats and be all kinds of evil.

And yes, I did this. Paddington gloriously runs into the bathroom and sits carefully before the toilet awaiting his treat anytime someone walks upstairs.