Also requires you to be ugly
Charisma is not about just how you look, but how you present and the way people react to you. Imagine the fat, dumpy old Dwarven Bard. He is an excellent story teller, talent musician, easy going, loves a good drink or a good bar fight. he walks into a bar and people love him. He might not be pretty but his presence is enough for people to find joy, THAT is a high Charisma.