The failing grade (wolvenrogue and creamy lips)

Dr. Robert Moss had been a professor in the human biology department of Blaine University for 15 years. He kept himself in shape and had an athletic body, a full beard with just a small touch of grey, and piercing blue eyes. He often went cycling shirtless in the warm climate at Blaine. Though he didn't realize it, he had quite a following at the bike path among the local female population. It seemed, that the combination of a trace of grey, powerful arms, big shoulders, and washboard abs made him a hit. They ladies also liked the hint of a Brittish accent that he had, being from Hamilton Canada.

He had seen students come and go but in all the time he had been teaching he had never run across a student like her. She seemed to be a quick learner, and she hung on his every word constantly taking notes. She was the first to answer questions and the last to leave the classroom. Her looks didn't hurt either. What surprised him most though was her failing grade on the midterm exam. Why would this nearly ideal student fail???