What’s mine is yours and what’s yours is mine, right? Not with solid boundaries, it’s not. You decide what you want in your life, and you mindfully accept or reject offerings as the world throws them at you.
In this middle school classic, if I have some trash but don’t feel like throwing it away on my own, I nonchalantly offer it to you, trying to get you to automatically take it. When you do, it’s yours and I refuse to take it back. Now you’re responsible for disposing of it. (haha!) Watch out, though, it might quickly segue into a game of Sneak It In.
This game plays with the idea of mine and yours, and it teaches mindfulness of your boundaries.