Unfortunately the it's not something you can just forget. It's actually something the two of you will never fully forget. In time I promise it will get better and easier to deal with and brought up less, but for now you have the difficult job of viewing it through his eyes and sharing what he needs shared.
I am a FWW. I know exactly what it's to have those "perverted" questions asked and not want to answer them knowing they are full of hurtfull images. Unfortunately, this is something your husband needs in order to heal. He needs the full picture so that he can put all the pieces in and then be done with the puzzle. It's a long hard road you have ahead of you, but I promise you also that it is well worth it.
The key here is that you take the time to look deep inside yourself so that when the time comes you can answer the ultimate question - "WHY?" This is one of the hardest to answer, but for many BS' it is essential to healing. Talk to you BH and let him know that you understand that for some reason he has to ask certain question for his own healing, but that you need to know it's safe to answer them. Meaning that you need to let him know that some of the answers are ugly and will hurt, and that if they will ultimately help your relationship you will discuss them with him, but that you need to know that he's not going to blow up or throw them in your face. My DH was very good with these answers. They hurt, and it really hurt me to see him hurt like that, but I think it was necessary.
Don't be afraid to FEEL his pain, and certainly don't be afraid to express it. Reassurance, reassurance, reassurance - as much as they need it. Don't ever show him you are bothered by answering to where you have been or where you are going, etc. He has every right to, and for as long as he needs too. It will take a very very long time for him to trust in you again, and you have to be able to understand and accept that.
I remember one conversation I had with my DH where he said something about trusting me. I softly smiled at him and said "no you don't. But that's ok, I don't expect you too, but one day I will give you every reason to again."
What you BH is feeling and doing is perfectly normal. Try to understand, and don't try to brush it under the rug. This has to be dealt with in order to heal properly. Hang in there, it is possible to survive, and it's so worth it. The people here are great, and very helpful. You will certainly find many times where you seem to be falling back, but remember 2 steps forward and 1 step back is still progress. I remember many times writing about boulders in my road, and falling back, only to come back the next day to tell how everything worked out great and we had such a productive conversation.
I've attached here a link to a current post where I included several past threads of mine. I thought some of they might be of interest and helpful to you. My best to you. Take care, and hang in there.
My Story