All the Charm of a Dwarf
'Salvador can do the talking, as he has a better charisma score than me.'
'No I don't', says Salvador, looking at his character sheet. 'Do I?'
'Mine's 6.'
'Holy crap, I do. It's 8.'
Negative ability modifiers for both! Why are either of them trying to get some important information from an NPC? The situation might get uglier than it already is.