Why are dogs and cats the most popular pets?

I personally feel that they are the best companions to have for a lifetime. It is not a coincidence that it has been said that a dog is a man's best friend. A dog won't ever betray you and will always be by your side to play and cuddle whenever you need it. The same things goes for cats and a female. Pets will always be by your side in hard moments and will cheer you up to. I feel that other kinds of pets will never be the same way because some don't even like to be disturbed too much while cats and dogs run to you when you come through the door.