Ok, so I know this isn't about London, but where else am I going to get so many Americans in one place?! I consider myself pretty fluent in 'Americanese' but 'cooties' just has me foxed, and it's driving me nuts, so please put me out of my misery. It seems to be a children's word (I can think of 'The Simpsons' where Lisa (or was it Bart?) holds hands with another child, and the rest of the kids point and laugh, "Lisa's got cooties!") Many many thanks for helping me out here.