Hey, I'm sitting here posing for you where what I would rather do is run around and play with a stick or roll through the mud so you should better have some biscuits in that coat or I'm off.
He got his biscuit, he knows by now that (most times) when he has to pose for photos he gets a treat as a reward.
Definitely a creature of habit...... and aren't dogs smart?? They know when they are going to get a treat. This is a very smart and photogenic dog! Did he also get to roll in the mud?