Your question made me think of my one and only hand quilting class. There was that one lady in class - the type who seems to pop up regularly in my classes - who had taken a hand quilting class once before, and remembered just a little of what she had learned in it. And of course her first instructor was the one who had to be right. This lady kept asking for tiger tape. The instructor told her very nicely that she didn't need it for this class, and even told her why, but after hearing the request several more times the instructor finally got her some tiger tape.