Re: Wife's lack of fantasy
I know with me, I have fantasies, but I rarely remember what they were.
So when when my boyfriend asks me "What do you fantasize about?", it's like him asking me what I wanted for my birthday. I might have had some ideas about what would be cool, but upon direct questioning, I totally blank out on the subject. I usually end up texting him later with ideas, after I've had a chance to think about it again.
Maybe try approaching your wife in a different format? Some people may have an easier time writing about something than saying it.