All of the trays in our canteen were dark brown wood except one, which was still brown, but slightly lighter. This was the gay tray, and if it was top of the pile when you came to the stack, you were obliged to use it. This usually meant losing your dinner, as you would be decked (qv). Taking the normal, presumably straight, tray from underneath it was even worse. You were then "gay scared" (a kind of state of beyond gayness) and got a beating behind the stage curtains. One boy got set up with the gay tray every day for a week, until he was caught throwing it into the skip during break. The preferred interpretation of this was that he was on a secret date with the gay tray. So; "Gay Paul Clay With the gay tray Sticks it up his bum Then he bums his mum"