I couldn't do that. Mainly because I have a cruel sense of humor (I've been told)
I'd do things like purposely walk around with my ribbon untied (so she would have to tie it for me).
Forget my umbrella, (so we would have to share one).
Iron one of the pleats in my skirt wrong (so she would compelled to stare at my legs all day).
But, I would NEVER do that. ^_^