Agree with Chattiesmom
I don't have any issue with people petting Jackson as long as they are polite about it. He's shy with strangers but if I never allowed anyone to pet him, he'd be worse. It's good socialization for him and he's gotten much better with allowing strangers to pet him, slowly but surely. Most people are kind enough to ask me anyways, thankfully. I always tell them "he's shy, pet him under his chin, that's his favorite spot!" Jackson's more comfortable with putting your hand out, palm out and petting him under his chin than a hand coming straight down on top of his head.