It's perfectly normal to have transgender fantasies. In fact, it's quite common. Many people find themselves attracted to the transgender community and enjoy fantasizing about being with a transgender person.
There are many different types of transgender fantasies. Some people fantasize about being with a specific transgender person, while others fantasize about being transgender themselves. Some people fantasize about transgender people in general, while others have specific fantasies about particular transgender body parts or activities.
Whatever your specific transgender fantasy may be, it's perfectly normal and nothing to be ashamed of. Enjoying transgender fantasies is a great way to explore your sexuality and learn more about what you find attractive.