I Just Don't Get Her!

I just don't! I go up to her, and give her chin rubs. Then, when I think I have my point across, I bat at her cheek. I just want to play! But every time, we box a little, then she hisses and runs off. And The Grump isn't any better. I can't even give her chin rubs. She makes "grem-lun" noises and runs off. What's with them?

Still the best cat in the house, Henry.