I never quite understood why Mustapha Mond had red lips. In Chapter 3 it states,
On the fringe of the little group stood a stranger- a man of middle height, black-haired, with a hooked nose, full red lips, eyes very piercing and dark.
Most people in real life don't have red lips - if they don't wear any makeup over their faces. This is a curious question I have, like where did the red lips come from? He must have worn some form of lipstick or something.