I do coke a couple times a month with a few friends. We usually just chop up our coke on a plate, break it up into lines with a credit card, and snort it up right off the plate with a rolled bill. Every once in a while, this other guy comes over and hangs out with us, and he bitches about how he likes to snort off a mirror. I don't see the point in this. I've tried it myself, and it doesn't make any difference, I can see the powder just fine when I'm snorting off a plate. What's the reason for this?