There's no official confirmation that Mads Mikkelsen reads fanfiction. Fanfiction is a niche area mainly enjoyed by fans, and while some actors might be interested in it, there's no evidence to suggest he does.
One common theme is his on - screen characters. For example, many fanfics revolve around Hannibal Lecter, exploring different aspects of his personality and his relationships that weren't fully explored in the original works. Another theme is his charm and mystery as an actor. Writers often create stories where the protagonist is drawn to his allure.
If Mads Mikkelsen read fanfiction, it could be really interesting. He might get a different perspective on the characters he has played. He could see how fans imagine different scenarios for his characters, which might give him new ideas for future roles.
One great piece of Mads Mikkelsen fanfiction is 'The Journey with Hannibal'. It takes the essence of his iconic character Hannibal Lecter and spins a new adventure where he teams up with an unlikely ally. It's really engaging as it delves deep into his complex character.
No. 'Fantastic Beasts' is a series mainly about magical creatures in the wizarding world, with themes of adventure, magic, and friendship. It has no relation to erotic fiction at all.