Do other magical beings besides fairies exist (like wer-creatures, vampires, succubi, Big Foot, dragons, etc.)? I think Tony would ask Loki if any of the other stuff is also real.
Loki is pretty vague about that sort of thing. Of course Tony wants to know everything about everything, but Loki is a fairy, and as such thinks most of the other creatures are beneath him.
Especially since Loki isnt exactly a fairy, with whatever else is flowing through him, he doesnt like talking about what else is out there. Plus he doesnt like the idea of his human being interested in other creatures so he is sort of petty and selfish with his information.
Tony picks up on it, of course, and decides not to ask anymore, he just pulls at Loki until the fairy slides into his lap and puts his head on his shoulder.
For being such an old creature and one of so much power, Loki is incredibly insecure and Tony– Tony is fine with that.