Ambidextrous (3.5e Trait)
From D&D Wiki
You are equally capable with both hands, but that can be a bit distracting.
Benefit: If you are wielding only light weapons, the penalties for fighting with two weapons are reduced by one.
Drawback: You take a -2 penalty on initiative checks.
Roleplaying Ideas: When your character has to write something say he uses his left or right hand. When he needs to write something a second time switch the hand he used to write the first time.