My younger brother wants to raise an animal at home, but our family members did not want any animals. So, I start to explain to him why we do not like animals. “Sometimes animals are dangerous because they can attack people. For example, animals such as lions, tigers, snakes, and bears are dangerous if they escape. Moreover, animals like foxes lions, tigers, bears, and snakes may attack people!�? my brother said, “I know, but I just want a small pet which is not dangerous!�? I thought about how I can persuade him. I said “You are right, but animals are still dangerous although it is small because of viruses. Viruses like HIV and SARS spread easily. Animals can become a route of infection.�? He did not agree with me because he was not stupid. I knew my reasons are not made sense. Eventually, I allow him to raise a pet and he promise to take care his pet well including giving the pet bath and cleaning the pet’s excrements. He was really thanks to me. He said “When I become I earn money, I will give you an expensive present like a diamond�? As you know, people usually wear diamonds as shiny jewelry. I recommend a cat as his pet because dogs, cats, and cows bread quickly.