Doesn't everyone else roll paper receipts etc. by the corner into a long stick? As a kid I sometimes licked the trailing corner to make it stick even better. I

Doesn't everyone else roll paper receipts etc. by the corner into a long stick? As a kid I sometimes licked the trailing corner to make it stick even better. I was and am always intrigued by how it becomes so much stronger and stiffer than the original flat sheet, but I never scienced too much into it :)