Not sure what he's doing wrong, but he has the measure of Mummy alright
We have played the 'you have to go outside, now' game with all our sheps, every shep on the planet has that paws over the nose 'lalalalalala, no one can see me...' look down to a tee....
He'd been whining and 'shnozing' at me for a while. Everyone else had gone to bed (inc my old GSDx) and I was up watching a film. He wanted me to go to bed (so we could all be together) and he was getting annoyed with me.
I say "No" alot in jest as it isn't a command to him, I use "Ah Ah" or "Oy" if he is naughty.