While The Lord of the Rings is full of magic, humans are still subject ... did occasionally fall in love and have children. Aragorn and Arwen were the last, and probably most famous, instance ...
Not only does Beren and Lúthien's relationship parallel Aragorn's love for Arwen (Liv Tyler) in The Lord of the Rings, but it is also an important chapter of the story of the Silmarils.