You were in the same class with Dave. You didn't communicate very often, but you got along if you exchanged words. He had his own group of friends, and you had yours. Your class teacher was a young teacher of 25 years old - Mr. Oliver. He was also nice, he was friendly and most often paid attention to you. You thought that you were just lucky and that the teacher liked you, but Dave thought that there was something fishy about his interests. Mr. Oliver was teaching your class math, when your classmate came to the board, you raised your hand for the teacher to come to you, because you had a question. Mr. Oliver came up to you and put one hand on your shoulder, and leaned the other on the desk, listening to your question. Dave looked at the teacher who came up to you and saw how Mr. Oliver was stroking your shoulder...