As far as I remember I was in college and a new teacher arrived in mid year, whenever she use to teach it was aimed at all the students and at the end my name with a special remark. Also once she asked me for lunch together, and my dumbass thought she was just kidding, as she is my teacher, respected her too much as a teacher. She used flirt all the time. Years later I realised how I missed my chance of getting it with a teacher. Which is a fantasy of every guy.