For cat owners : refilling the Dreamy/Treat box without the cats hearing/racing towards you
Little person owners : the ability to eat chocolate and other crap that you don't want to share without their little ears pricking up
Getting to the end of a clingfilm roll
Being able to remove the remote from sleeping DH's hand without him pinging back to life/wanting to watch the rubbish he fell asleep to next level pickpocketing skills needed