Winkle will stop whatever she's doing, which is normally nothing much, and go and attack Rumple.
She will jump on him and roll on him.
There will be a wrestle.
He'll be on the ground on his back. They'll chase each other for a bit and then stop and go back to whatever it was they were not doing like it never happened.
Weirdly I've noticed recently almost exactly the same behaviour in birds.
I don't know if it is a mating thing or a dominance thing or a food thing but they all seem to like to have a bit of a rumble that's robust but playful rather than vicious.
The little corellas at University of Queensland Lakes are prime example. Their behavioural display was almost exactly what the dogs do.
The lorikeets my dogs love to visit when we visit Grandma's were also exhibiting a bit of the same this afternoon.