Comeliness: The actual measure of how attractive you are. Charisma is your personality not your looks. Defined as pleasing in appearance; attractive; fair: a comely face. Proper; seemly; becoming: comely behavior. Comeliness follows the same rules as any other statistics. It has two skills associated with it.
Seduction: Your ability to seduce an NPC that is potentially interested. This prevents awkward role playing for me and lets you get on with your business.
Persuasion: Using your sex appeal to persuade someone vs trying to convince them with a valid argument.