Dear Mr. Hick, I’m thirteen years old, writing from Atlanta, Georgia. My friend has a German Sheppard named Sparky. Sparky is a neutered male, but that doesn’t stop him from sometimes demonstrating some pretty gross sexual behavior. What I mean is: He likes to hump my leg. He also likes to hump my friend’s leg, and the legs of a lot of our other male buddies. So my question is: Can a dog be gay? Billy Greeling Atlanta, Georgia Dear Billy, Well this is a strange question, Billy. At first, I figured you were going to inquire why spayed or…