It's a great insight. I think that many wives suppress their fantasies, and some to the point that they haven't even really given themselves permission to have them, thinking that it was a "guy thing." One of the things that we did that I think were crucial to her feeling safe to even think about and then to share her fantasies was we read a book together on eroticism in the marriage (Esther Perel's Mating in Captivity). We read it chapter by chapter, discussing each chapter, asking each other questions about what we thought/felt about it. We actually did more than once, since the first time she was too closed off to to even engage honestly. But eventually, when she realized that I actually wanted to get to know her sexual self. she began to open up, to feel, to fantasize, and to share.