The wise man and sweets.

There once was a little boy who was very find of sweets and he would always be found eating them. His mother and father tried to make him stop but they were not successful. After a while his father got fed up and decided to take the boy to a wise man to see if his son could be helped.
The father went to the wise man and told him of his son's problem "my son loves sweets and eats a lot of them and we are worried about this and want him to stop"

The wise man told the man that at present he could not do anything and that for the man to come back in month with his son.

A month went by and the man returned with his son, he told the wise man of his son's problem "I know your son eats too many sweets but I could not do anything when you first came here as I had a sweet tooth and it would hardly be fair for me to ask your son to stop eating sweets so I decided to stop eating sweets myself" replied the wise man.

End of story