I know what you mean. My old roommate used to be a parts mgr for Pep Boys Auto. He would have people come in and say they needed a headlight for their truck. He would turn away, grab the 1st headlight and hand it back to them. The customer would say, " will that fit?" and my buddy would reply "how the hell should I know, I don't know what truck you have, you just wanted a headlight for a truck." Most times that would jog the person's cloudy mind to mention what type of truck they had. But sometimes, the person would turn around w/ the unknown headlight and go pay for it and leave. A couple hours later to return because it didn't fit. Go figure! Sometimes you just want to bang your head!!!