9 How and Why to Keep Smiling

There still are scientists who claim that humans are the only animals who can smile. I don’t believe that.

Daisy, our yellow lab, has a killer smile. As she establishes eye contact, her mouth drops open and the corners turn up, wider and wider. When she gives my husband, Andy Alexander, her love gaze, his big grin mimics hers. The two of them may briefly freeze like that, with locked eyes and happy faces. At other times, Daisy’s smile overtakes her body and—still looking Andy straight in the eye—she gyrates with pleasure, from her wagging tail and wriggling butt to her vibrating shoulders.

I’ve noticed that simply by describing a Daisy smile, I can trigger an intense answering smile on Andy’s face. Because he frequently ...

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