At my high school the art/music teacher was similarly shaped and usually wore loose hippie dresses, the guys were always doing stuff to get her to lean over, moving the piano so the bench would be right under the ceiling AC or finding excuses to stand over her when she was sitting down. She had to know what we were up to but she was always smiling and laughing, and I'm pretty sure she was stoned most of the time, she had that weird visine glaze in her eyes all the time and smelled like salix bark or whatever that oil is that stoners slather all over themselves to hide the herb stench.