you have to start teaching them when they are young if you wait till they are 15 you've already lost.
my brother wanted me to take his kids when they became teenagers and started acting badly....
I said "no way" you want me to pay the price for you lack of parenting the last 15 years? forget it! you reap what you sow.
I have several kids younger than 4 that I can just look at the right way and they burst into tears, that's parenting.
That's very nice for you. You have compliant children.
I could beat mine to death and they wouldn't care. It is a constant struggle to discipline a child who doesn't care about anything.