We've all been there: You're having a great time at the dog park with your best friend, who's frolicking and having fun. Everything is postcard-perfect until … you notice she's humping another dog. SO ...

"On a beautiful, warm afternoon, I watched a group of dogs frolic in a dog park. Suddenly, I heard a woman’s high-pitched yelp, followed by the pounding of human feet. There was no need to look; it ...