Let me set the scene for you...
It's dinner time. Mama's busy in the kitchen making her yum-yums. Patches and I are sitting under the table, keeping out of her traffic path and patiently waiting for something tasty to drop onto the floor.
Mama calls us over "Patchy, Sparky - come here! You want some avocado?"
She uses a spoon to taste the avocado herself before letting us have a bite.
She scoops out a spoonful for Patches, then me. Repeat until one bite is left.
Without thinking, mama then eats the last bite off of the same spoon that Patches and I totally goobered all over! Mama stops. Thinks. Makes a terrible face and spits out the last bit of avocado into the sink.
(Mama's note: A dog's tongue is not only his wash cloth but also his toilet paper. Blech!)