I'm not going to feed my son dinner the past 3 days
Why do you not want to feed your son dinner for 3 days?
He is starting to get fat and needs to eat less.
going without supper for one night is one thing, but for three? That's going too far.
I'm tired of making him understand all the time.
Humans need food to live, it's a basic necessity for life. Instead of harming your son like this, why not try to learn about proper diet and nutrition better? The two of you can learn and support each other instead of doing it in a harmful way.