A male GSD I used to have would beg me to nail him in the face with a stream from the garden hose. He'd snap and growl at the stream, and then run away like he hated it. Then he'd come right back, begging for more until I squirted him again and the cycle would repeat itself. He would have gone on for hours like that if I wanted to.
They can be the biggest bozos of all dogs, IMO. But I wouldn't care to have any other breed.