In foreign countries babies strip down to their diapers or bare bums and tear across the beach enjoying the sunshine, water and freedom from clothing. Girls and women go topless and wade in the surf wearing just bottoms and no one bats an eye or does a double take. But in America, most people keep themselves and their kids — even wee babes — covered with a pair of swim trunks or a bathing suit. Does it bother you when youngsters soak up warm weather in just their birthday suits?