Uncovered

If a young man walked into the café with as much of his body uncovered as the young woman with him, he would be asked to find "proper dress." What does this mean? It is an important question, since most young men's bodies would be as wonderful to look at. In fact there would be more detail to attract the eye: patches of hair, vascular paths, muscle shapes, bony highlights. And so why do we shelter this from view. Are men more modest?