Someone said:
But if the shield controversy is interfering with my point, forget shields and think on a torch. A torch can be used as a weapon (or, for the argument´s sake, suppose it can be used). Should every torch-bearers suffer TWF penalties?
Okay, I'll begin by using a greatsword as an example.
A greatsword is a two-handed weapon. If I hold a greatsword in one hand, I am holding it in such a way that I cannot attack with it. I do not threaten an area, even though I am holding a melee weapon. It is in my hand, but it is not wielded.
Now, the Two-Weapon Fighting text states:
If you wield a second weapon in your off hand, you can get one extra attack per round with that weapon. You suffer a –6 penalty with your regular attack or attacks with your primary hand and a –10 penalty to the attack with your off hand when you fight this way.
So, the penalties apply when you 'fight this way'. By the wording, 'this way' could apply to two clauses in the previous sentence: 'wield a second weapon in your off hand', or 'get one extra attack'.
So, which? Well, the 3E Main FAQ had an answer about Defending weapons:
If you hold the weapon in your off hand and claim an Armor Class bonus for it, you take all the penalties for fighting with two weapons, even if you don’t actually attack with the weapon.
If we assume that this is correct, we can see that 'get one extra attack' cannot be the definition of 'fight this way', since penalties are incurred despite no extra attack being made. The penalties are thus incurred for wielding a second weapon in your off hand.
So, what happens if you hold a Defending weapon in your off hand but do not take the penalties? You can't claim an AC bonus, but why not? Well, the AC bonus of the Defending weapon applies to 'the wielder'. And it is 'wielding' the second weapon in your off hand that provokes the penalty.
So, much like I can hold a greatsword without wielding it, it seems that there is provision to hold a short sword - or a shield, or a torch - without wielding it.
What are the effects of this? Well, if I'm not wielding it, I can't attack with it. If I can't attack with it, I don't threaten with it.
Let's say I have a longsword and a light mace. I'm fighting a mixed force of skeletons (DR X/bludgeoning) and zombies (DR X/slashing). A zombie moves past me, provoking an AoO.
If I'm wielding my longsword, I can make an AoO with my longsword. If I'm instead wielding my mace, I can make an AoO with my mace. If I'm wielding both, I can make an AoO with either, since I threaten with both - I should choose the longsword to deal slashing damage -
but, since I am wielding a second weapon in my off hand, I am 'fighting this way', and incur TWF penalties on my AoO.
Is this versatility in AoO options worth the penalties on the attack roll? That's for the individual to decide.
So, a character with a sword and a torch could choose to hold the torch - taking no penalties - or to
wield the torch as a second weapon in his off hand, thus incurring TWF penalties, but gaining an extra attack with the torch in a full attack, and the ability to threaten with the torch.
-Hyp.