Cash and June do the same thing. Cash loves to drag June around by her ears or her topknot. I have always been worried because he could hurt her. But then I saw that when he really hurts her, she gives a loud yelp and he lets go. When she gives that yelp, he always lets go. It really put my mind at ease that he knows when he should stop.
If we stop their playing beforehand, June goes back for more! They differ by 3kg and Cash doesn't play nicely, so I was always worried. But even as a puppy, she would continue teasing him after he pulls her ears! They also play hide-and-seek under my bed because June is small enough to fit and Cash isn't. It's really funny to watch - she looks like one of those games at the arcade where heads pop out all over the place and you have to hit them, lol.