I don't agree. If you want to make any attacks with the secondary weapon, including AoO, you need to take the TWF penalty on all attacks in the round.Zaruthustran said:And remember that the additional -2 TWF penalty would only come into play when you did a full attack that used more than the one weapon.
You cannot make some attacks without the penalty, and then decide later that you want to bring the off-hand weapon into play. That would be like deciding to use Rapid Shot for an extra bow attack, after you already took some of your shots that round without the -2 penalty.
Even in D&D, there ain't no such thing as a free lunch.