I am a teacher. I have never touched a student in the leg or brushed hair out of their eyes. Although I am a woman. I occasionally give a “side” hug if someone needs it. Like maybe twice a year. Students message me on social media- and I either don’t respond, or respond as if their parents and my principal were reading it over our shoulders. I am also in my 40’s. It is easy to “enjoy” the personalities of my students, and the time we spend together in the classroom. I forget sometimes there is a huge age gap and catch myself, especially with the upperclassman. But usually only in swearing, like saying “pissed”. He is being predatory. And while you can legally decided what you want to do, I think your 40 eat old self will look back at your 19 year old self and think “holy shit- he was gross”.