Bad Company

Once there lived a wise man with his only son, Will. Both of them lived together, and loved each other. As time passed and Will grew older, he started to spend more time with his friends. Most of his friends were nice, but some had bad habits. With time, Will also developed some bad habits in their company.
Will's father was very worried about the habits of his son. He tried his best to mend his habits but he was not successful. 
Then one day, he thought of a plan to teach his son a lesson.
He went to the fruit shop and purchased some apples. He came back to his home and called his son. 
He asked his son to put all the apples in the fridge.
"But one of these is rotten, Papa!", Will exclaimed. His father told him not to worry, and follow his instructions. Will was confused, but did the same. After some days father asked will to bring the apples. As he opened the door of fridge he was surprised! All the apples had become rotten! He felt sad.
On seeing this, his father explained to him how one rotten apple had spoiled all the rest. Just like apples, one bad companion could spoil all others in case of children too. Father's advice got Will thinking. He gave up bad company and became good again.