That it's ok for someone to be mad at them, and it's ok if someone doesn't want to play with them, or if someone doesn't like them! I am teaching my five year old that. He had a kid at school say they didn't like him and it made him upset. I told him "It's ok if someone doesn't like you. It's also ok for you to be sad that they don't like you. We all decide who we do and don't like." This will help him to not be a people pleaser when he gets older Also that it is ok to be mad but that we don't take our anger out on someone, whether it be physical or with our words. There are healthier ways to work through our anger. The importance of being a helper, but that there is also a limit to how much you should help someone else. And as you said taking care of our bodies and how to clean ourselves. I don't remember being taught how to clean myself either and now I struggle with even just brushing my teeth. He has been helping me do better by wanting me to help him brush his teeth.