
Bear in mind when you teach a "finish" the dog is supposed to wait for the command, not do it on its own initiative
Likewise with "paw" people should only reward those responses they have
asked for, not all and any the dog offers sponteneously, or it switches to the dog using the technique to train people.
However.....I used to do some competitive obedience and once when I was competing the judge said "call your dog" i.e have him come from where he had been told to sit while I walked away from him and to sit in front, before the finish.
He did this beautifully and was in a lovely straight sit, right up close, looking straight into my eyes when he sat up perfectly on his haunches with his front paws neatly held in front of his chest (i.e the "beg" position).
The really amusing thing was not that he did it but how well and neatly he did it so myself, the judge and the spectators were all laughing, even though he lost points

My fault of course. The previous week I had taught him this new trick and position as "say please" from a sit in front of me so he "helpfully" anticipated what I was going to ask him to do next.
(I don't like to ask a dog to "beg", totally anthropomorphic as they don't know the meaning of the word but there you are, "say please" seems more respectful)
Another time I taught him to draw the curtains at night. that was fine until he got too confident and enthusuastic and nearly pulled the curtain rail down so I had to dispense with the service.

I also taught him lots of useful things: he would lead my horse in from the field and take him to the right stable, shut a door, fetch his dinner bowl, find my keys etc etc .
On one occasion he even let me in when I locked myself out.

He knew "find the keys" and he would retrieve to my hand so I just had to get him to "find the keys" and "Fetch" them to my hand through the letter box.
Pretty good though as many dogs wouldn't generalise a hand through the letter box at human head height as being the same as a hand attached to a whole person at human waist height.
He was a very remarkable dog altogether though

Enormous potential but very challenging to manage being sensitive, stubborn, strong-willed, VERY bright, very determined, high energy, confrontational etc but absolutely wonderful once you'd earnt and kept his respect which was no easy task.
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Had to delete some smilies as over post limit *disappointed smilie*)