Not wanting mayo can be that little something that could drive someone insane. If you really hate mayo and you get it on your sandwich, you become a very unhappy person, almost instantly. Walking very fast in the cold, late to catch a long bus ride, my attention was grabbed by this vibrant yellow and NO MAYO was there. Where it came from? I mean, what is the truth behind the two words? The awareness was instantly aroused by the sticker. And then suddenly I caught myself checking the time and realizing I was about to miss my bus.