duke, my sweet old golden will lay on his side on the grass or bed and make swimming motions, then slowly roll onto his back, where his hind legs will pump like pistons and he wiggles around making grunting noises, then eventually he ends on his other side, with a big golden grin and tail thumps.
alex, when trying to convince me to give him some of what i've got, will rest the tip of his muzzle on my knee and give puppy dog eyes, looking hopefully upwards.