Smile a lot, laugh too – much of our lives are filled with boredom and, worse, frustrated people who are generally grumpy for no reason (the person in front of them at the grocery store decided to pay with a check at, perhaps). People will appreciate if you smile at them, and if you laugh from time to time. They’ll often smile back, making you feel better and, if you’re lucky, they’ll do extra things for you because you smiled. Dogs wag their tales and tongues when they’re looking to tell people that they’re happy. What us humans have is smiling and laughing. Which one would you rather be around (dog and human)?