My mule was pretty shy when I first got her and I was trying to find ways to make her feel more comfortable so I tried to find her favorite spots to be itched. She really likes her tail head scratched and she likes her ears stroked. Recently I read something about mares getting itchy between their teats, but they can't reach it to scratch themselves so I tried that out. Most favorite spot yet. She really stretches her neck out and looks so happy. sometimes I step away to see if she wants me to continue. If she does she will take a step towards me and present the place to be scratched. It's kind of nice to have something so clearly communicated.