Yea I just got one and it can only go in off hand... being that I have a crude stein, and that the doll is no drop, its kind of worthless. But one good thing, it looked funny as all hell. Looks like a beat up old doll.
The drop a so called Mystic Doll which is plus 3 Charisma...its no drop but not lore so you can hold two of those while go shopping..neat in my opinion =P