That can be useful, but the students MUST BE WARNED that it is a machine and not a human being because any empathy is going to be limited, innuendo and implied but not expressed feeling, sentiments and even emotions are going to be misunderstood at best and not understood at all at worst. Teaching is a highly emotional activity that varies immensely from one student to the next, from one teacher to the next. Students should know it is a machine and that any sexual fantasy is out. Since sexual fantasies are fifty per cent of what students have to ask or say, I cannot see how the machine can react in any human way. Imagine the way students, boys and girls, young men and young women alike, come to a one-on-one with a professor, man or woman alike, and you will know that dimension is just out with a machine. It is at times funny to see how sexy some students can be, not with perverse intention, just because they consider showing off at that level is part of the game.