Once upon a time, there were two very good friends: a cat and a dog. Dog had more money than cat. So one day cat decided to teach dog to play cards and get its all money.
Cat taught dog how to play cards. They started to play cards. Every time they played cat wins. Dog was frustrated with this. Dog consulted with the seniors why he always lose. Finally he got advice that don't put the cards open on floor when he scratches his body.
Dog happily came to cat and wanted to play big game. Again dog was loosing and loosing. Every time dog had a good card, cat folded its card and rest of hands cat had good card and he loses more and more money. He was totally surprised; how cat already know if he had a good cards on hand. After loosing lots of money, he again consulted to its seniors how cat knew he had a good card.
His seniors said him, "You play we'll see how cat cheated on you". After playing few time and loosing more money. Dog came back to his seniors and wanted the reply".
His seniors slapped him one by one and said "Never wag your tail when you've a good pair of cards on hand"