We have a relationship of cheerful antagonism. I enjoy twisting his tail and he enjoys wagging his finger at me.

The tail is definitely wagging the dog here,

She's doing great. She's all shaved and has staples, but she's wagging her tail.

We had someone come the other day, and Alice was meeting two dogs and wagging her tail, and she came up to this person very quickly. She is still cautious and a little shy but makes friends quickly. She is confident, healthy, happy, social and loyal. She comes immediately when called, can be walked off-leash, knows basic commands and is very well-behaved. It's so encouraging.

Wait, he's coming to the window, ... He's wagging his tail.

I think the tail is definitely wagging the dog here.