Here's a pic for example.
I was on the laptop, and I asked my sister to pretend to look at the laptop, and Joel went between us and put his front paws on her back. As you can see his butt is still up so it's not like he was even trying to lay down. He stayed like that for a while until I told him to get off.
But to me it looks like he was holding her down


to keep her away from me.
So to stop him before it happens, what should I do?
Instead of teaching him not to protect me how do I teach him he doesn't NEED to?