Hi Ela,
It seems like there is no any logic in finding preferences and sexual attractions in humans. I wrote this in other thread based on article that I've read about similarities in all mammals in this area:
"It seems that there are some facts that are showing us that some our preferences are resulting from very complex interactions of our genes and social environment resulting in specific sexual preferences."
Certainly it is possible that your husband has fantasies about women/girls only.
But anyway person who has record of child abuse should never be left alone with children, risk is to high and there is no expert who would make me think differently..... Please never left any of your kids unprotected in his company...
Just my 2 cents...
My story