“A dog is the only thing on earth that loves you more than he loves himself.”
― Josh Billings

Why dog is a man’s best friend?
A big reason why Dogs are a man’s best friend is dog can give happiness on our lives and dogs are a loving companion in a man’s life. Dogs are important to a man’s life because they give joy to us, dogs can teach us about friendship and selflessness and, superb loyalty. These are the reasons why man thinks that a dog is supposed to be a man’s best friend.
First is, we can trust a dog that other humans because they have an unwavering loyalty to its master and owner. Second is, a dog will never will leave you no matter what will happen to you or to him. Third is, a dog can make you laugh even if you had a bad day and he will comfort you until you become happy. A dog can give you a good health because while you are walking or exercising him in the streets, you too can exercise yourself. A dog never fails to greet you when you got home to your school or from work, even if you are tired, a dog can make you feel relaxed and less stress. A dog guards your house whenever you are out. And lastly a dog can sacrifice his life for his master whenever his master is in danger. And a dog might even die because of sadness after his master is dead. A dog is certainly a true and a loyal friend.
Therefore, I conclude and I’m very sure that it is right to call a dog man’s best friend.