There are many more, but here is some stuff I remember currently:
If you lend a barrel or Keg of some Alchohol like Ale, Beer, etc to a Dwarf, they will return it to you, and normally will bless it for you.
If they do, NEVER open the barrel! If you dont, your keg will pour unlimited Alchohol for you magically, but if you do, the Barrel inside will be empty, with the possible type of exception of cobwebs, and the Barrel you lent will not be blessed anymore.
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