Could somebody not put my initials…

Some things just have to be confessed to the world. When I was in 4th class aged 9 there was an ongoing occurrence of someone deliberately missing the urinal and going all over the lavatory floor. This lavatory was adjacent to my classroom so the culprit could have only come from my class. The teacher, who was female so by nature even more gullible than 9 yr old boys came up with the following plan to catch the culprit. This grown woman, if I recall correctly about 35 and in no way fuckable although I do recall I would often stare at her big boobs when she leaned over me to correct my work with a red pen said ” You disgusting little boys, urinating over the floor, you should be ashamed, we’re bringing in a new rule, Im going to affix a sheet of paper with a pen to the lavatory door, from now on when you go to the toiliet you must write your initials on that sheet, this is how I shall find out who is responsible”. Straightaway I spotted the flaw in her plan and quite logically thought ” But could somebody not put my initials on the sheet”.