Well, maybe he feels so guilty for what he has done, that he is starting to think that letting you get even might be the only way things can go back to normal. It would be kind of like as if you having an affair is going to match him having one,therefore you guys would be able to sort of start over. Be think very careful about this.
Based on how you felt hurt to know he cheated on you, do you really wish he feels the same way, for real? Answer It sounds like he may possibly be angling for an "open relationship" or he misguidedly thinks this might even up the score and free him of the work involved in restoring the trust in your relationship and so on. It might be best to explore this directly with your husband as we can only guess at his motives.
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.