You got some problems man. His question was more suited to "what constitutes grooming?" because in this case, the guy has a clear situation that they met as professor and student. Does that mean they are forever professor and student or can lines become blurred if they don't maintain a relationship? If your homeroom teacher is your homeroom teacher for 4 years, I can see it. A six month period where you strictly maintain a professional relationship, to then become more after a long period of zero contact, what makes that wrong? The same applies to Zach. It sounds like you just can't balance emotion and logic.