Beaches Guide

Why must "suits" be worn on beaches in the USA?

Any place I’ve been in the world except Saudi Arabia, Iran and Indonesia do not require people to wear "bathing suits" like in USA. Even in Muslim countries Egypt and our neighbor Canada it is legal for women to go topless. Is because of the Puritan influence still ahold in the US or do the manufacturers of bathing suits keep these archaic laws on the books to sell more suits?

Actually the laws against topless sunbathing are state laws. There is no Federal law against it, and on a beach in my area within a National Park system nude sunbathing is allowed in designated areas.