This is what I’d teach to my kid if he does learn to understand it..

Sharing is a good thing. If we bring stuff of yours out, you can take turns at it but you should pass it on. You don’t HAVE to, but people will like you better that way. I will show you often how to share, negotiate, and defend yourself so I won’t need to do it for you. Don’t ever pick on someone when the fight isn’t fair – as a toddler, this means you don’t steal shit from kids who can’t walk or whose parents are going to be angry with them for being in the situation in the first place.

Making people like you is a really good thing, even if you are not interested in people, because people can help each other. If you are nice to your friends and share with them, they will like you more and they will be nice to you and share with you more unless they’re just mean people, in which case you find other people. If you only think of yourself, they will stop thinking of you because there needs to be a balance. We are part of a community, and that is based on things we share.

So, as a toddler, I will compliment you when you share, but for one reason or another.. I don’t think you yet get why people share. That’s ok! You’re 19 months old. But whether you get it or not, I do want to emphasize to you that sharing gets you more attention than hoarding or stealing.