"A real-life example of that was seen in the life of a childhood friend many years ago, whenever he was eating bread he would give something tiny as crumbs to his siblings..."

Try thiswith any of my siblings and watch the bread leave your hand before it finds its way to your mouth. The have very crazy methods to teach peoplea lesson for trying to teach them a lesson. lol

But there is a lesson to learn from this and it is the need to be appreciative. But somehow,I think they were made to learn it the hard way.