Do Primary Natural Attacks take a -2 to hit

[8 Red Wizards]

This has been plaguing our group for awhile if a monster has 3 primary attack such as Werewolf Claw, Claw, Bite do those attacks take a -2 to hit or regular BAB. I know Secondary Attacks take a -5, but I could use a few opinions for clarification.

[Mort the Cleverly Named]

Regular BaB for Primary Natural Weapons. You also get full Power Attack Damage, but don't get iterative attacks.

[MagiMaster]

Unless you attempt to use natural attacks in combination with manufactured weapons, all primary natural attacks work at full BAB.

[Elamdri]

Primary Natural Attacks are at full attack bonus and do full strength damage and gains +2 damage for each level of Power Attack.

If a creature only has ONE primary natural attack (Read: Not that it has multiple attacks but only makes one, but rather that it ONLY has one attack) then it does 1 and 1/2 strength damage and gains +3 damage for each level of Power Attack

Secondary Natural Attacks take a -5 and only deal 1/2 str damage and gains +1 damage for each level of Power Attack. If you take the feat Multiattack, then they are at a -2 instead of a -5.

Double Slice does not allow secondary Natural Attacks to deal full strength damage.

A monster wielding a weapon and who has natural attacks can use both, but ALL natural attacks are treated as secondary natural attacks, whether or not they would normally be treated as primary. Also, if the limb wielding a weapon would normally be a natural attack (A claw for example), you forgo that attack (unless you drop the weapon).