Choice of clothing. wether it be under or outerwear should always be up to the individuals. No one should be restricted in that choice just because they aren't society's idea of the perfect size.
If you don't like what you see Jerek you always have the choice of not looking at the person but since this thread is about underwear then how would you actually know what the larger lady was wearing unless you were undressing them
Something you want to tell us?