I too was, apparently, clean and dry by 18 months. My mother was a war widow, my father was killed 5 weeks before I was born, so as soon as possible, I was enrolled at the many day nurseries that sprung up during WW2, as my mother had to go to work to supplement her meagre widows pension. I guess being potty trained was a requisite. I can just remember being there, odd flashes of memory such as being lifted into the baby seat on the back of my mother's bike, having a nap on a camp bed, playing on a climbing frame and not being able to climb into it! Just odd snippets.