Can someone explain the giving pets a torch thing?

[Vasarious]

1)Torch is secondary only. An npc usually only hits with primary, so putting something in its off hand makes it quad. 1 torch (or lantern) takes up less inventory space.

2) not certain about summoned pets, some stuff on the wiki says some auto dual wield but i dunno if thats accurate. Weapons force it tho.

3) a lot of times what you see as the 2h sword on a charmed pet is a mith 2h sword used for the worn haste. Torch forces off hand weapon and therefore quad.

4) giving items including weapons to non humanoid npcs doesnt work. Spiders or wolves wont use weapons, or other item for that matter (im prettt sure)