Awesome definitions Sagacious!

I don't have a lot to add, but I wanted to note that I've been called "pet" by one of my former Dominants who had an interest in pet play (as in when I pretended to be a kitten or a puppy, etc). It was his affectionate-yet-subtle-reminder of our previous play-times and meant with pretty much the same connotations as you associated with "girl".

Just my 2 cents...