Charming question about CHARM EXP.

So, about personality stuff and that. I'd love to know something about equipments with CHARM.

I have some theories, but... Let's see:

-It could mean that your charm goes up with it used, and back down when unequipped.
-Maybe it's that when you equip that kind of equipment for the first time, your charm goes up. The same item won't grant you more charm, regardless if it's a new one or not.
-Or maybe it means that equipments have charm in them that transfers to the first person to wear it, and then they get "used up".

So... Anyone knows? Oh, and also, a list of the charm on different items would be charming, too.

*DISCLAIMER: The person posting this thread is not responsible for the lack or low quantities of charm in the starting post.

Theories checklist.

1. Untrue, Charm EXP stays even if the item is unequipped.
2. If it's a new item, it can give you more charm EXP. First part is correct.
3. I don't think so. The character that has not equipped said cash item will still get the Charm EXP. I think each character logs what has it used, or something. Not entirely sure.