How can I improve and increase the amount of ual imagery in my dreams.?

In spite of loving and nudity, I never dream about it. I have all the time, masturbate and look at heaps of . However, it never comes out in my dreams. I would love to dream about a wild fling with two women at once or see my wife having with other men. Again, I never, ever get to see these sorts of wonderful images in my dreams. In contrast, my wife usually has wild and wonderful ual dreams and she tells me about them in the morning. I end up intrigued, yet envious of her unique pleasure. What should I do? Greg.