A female truck driver decided to buy herself a big dog for protection while she was on the road. She went to the local animal shelter and asked about one particularly large and fierce looking dog and the attendant told her, "He doesn't like men."
Perfect, she thought, and so she bought him. Later that week, she was in a dark parking lot and two big, rough looking men started walking toward her. Sure enough, as the attendant at the animal shelter had told her, the dog didn't like men. He promptly ran and cowered under the nearest car.