There are differences in what people describe as ugly. There's those who might not be at all conventionally attractive but have likeable enough faces and can thus get along with others easily enough, have friends, maybe find a partner eventually. Then there's those who are just unattractive, who's headshape does them no favours, who's faces default to a scowl or otherwise unpleasant form. And that causes problems, socially, and particularly with the opposite ***. Of course it's taboo to point this out, cause 'no-one is ugly' etc.