I remember in HS I had a teacher that would give me extra credit if I sat at his desk with him. He was also very touchy, like hands on legs and squeezing arms/shoulders, lingering touches etc. Never went beyond that, and was only with male students.
At the time I was like "This is such easy extra credit" as I sucked at his class but when I look back now, I think "WTF?!?!?"
I was 13 years old, didn't know jack shit about much of anything (grew up in cornfield nowhere'ville) so I can see how students can be manipulated with attention and compliments.
I wonder on occasion if that teacher ever crossed the line and got shit canned/arrested.
Point is, adults taking advantage of teens or younger who are clearly not fully aware of their bodies or their emotions is just pathetic.