Yes, men think about sex a lot. No, there is nothing wrong with that. We all were created sexual creatures.
That is how God intended us to be fruitful and multiply. Your nervousness is not normal and maybe you should seek help for that. As someone else pointed out, you had to be thinking about sex to ask a question like this.
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.