I had the same thing for years. Still do sometimes. I hope you find someone to act it out with. And whats up with the nerd comment? Try using your brain for once, you may like it.
That is hot. I myself a a female who is turned on by Medieval Times. I've never role played, but have certainly thought about different plays in my mind when with a lover. It is normal and healthy.
I am an enternal mage of power! I summon you, Giant Butt plug of destorroth! Go, fight the warrior princess Shananes, the evil lady that uses the cursed Dildo of IcyCunny 2!
Normal? Nope. Could be wayyyy worse though.