From Justin J. Lehmiller Ph.D., in Psychology Today…
When you fantasize about sex, do you appear in your own fantasies? If so, do you appear as you do in real life, or do you change yourself in some way?
I studied the sexual fantasies of 4,175 Americans from all 50 states for my book Tell Me What You Want, and one of the many things I looked at was the way that we see ourselves. What I found was that many people change some aspect of themselves, such as their body, their genitals, or their personality. However, I found that different people change themselves in very different ways and that the types of changes people make seem to say something important about them. However, they also say something about our culture.
When I asked people whether or not they appear in their own fantasies at least some of the time, almost everyone (97.1 percent) said yes. Further, most people said they appear in their own fantasies most of the time.