This is what I told my friend yesterday.
Some parents display bad character in front of their children and still believe the kids won’t copy it just because they’ve been given advice.
Children don’t grow up by advice alone — they grow up by the behaviour they see you practising.
You can’t be a smoker, a drunkard, or a womaniser and then expect them not to follow your example simply because you told them not to.
They will conclude it isn’t really bad… because you’re still doing it.