Let's see if we can come up with creative lore justifications for even the most lore breaking and unfriendly of mods. It has to be something other than just "the jills."
I'll start:
Tropical Skyrim: The character is an ancient wizard who got so powerful that he CHIM'd it, because he thought Skyrim was too cold.
Guns: The DB was dikeing around with his Elder Scrolls and accidentally went far into the future where he looted advanced weaponry.