The outfit will be just as important as your ability to pose and say the right things. If he's primarily a Star Wars fan and his only interest in that you look like the Princess, then that's pretty much all you have to focus on.
But if he also liked the chained up, scantily clad woman that he could order around if he "owned" you (like in the movie but not limited to Star Wars) then there's much more you can do to play the role. To help you play the role of a slave better you can always read books that are written from the male perspective, words, phrases and situations that you can incorporate into your evening of fun. Oh, and some fun faux restraints might come in handy. Rubber ones from a Halloween shop (or online), silk/cloth ones from an adult store or leather and metal ones from a fetish shop.Just don't truss yourself up so securely that you can't get free should the fire alarm go off before he gets home. That would be almost impossible for him to explain to the police! :).
If that is his fantasy then just throw down some Star Wars one-liners and have fun. He will be stoked regardless.
I cant really gove you an answer,but what I can give you is a way to a solution, that is you have to find the anglde that you relate to or peaks your interest. A good paper is one that people get drawn into because it reaches them ln some way.As for me WW11 to me, I think of the holocaust and the effect it had on the survivors, their families and those who stood by and did nothing until it was too late.