Sometimes its difficult to tell which one's really can be safely pursued and which are better off left to imagination. The variety of fantasies we entertain is endless. Surprisingly, the vast majority of these basic fantasies are available in real life to most transgender persons. They can be pursued discreetly by oneself or through local transgender community organizations. Certainly caution should be used with initial contacts, however we now know that numerous transgender folks find their niche.
Fear is the obvious answer.
However, underscoring that fear is the continual messages society relays that transgender behavior is wrong. It is disheartening to consider the large number of intelligent persons that actually believe these messages. They don't, which is why they keep repeating their message, hoping you will believe it and feel guilty, ashamed and despise yourself. Strangely, sometimes even in the gender community, there is not always support for people who are initially trying to achieve their dreams. And, 'so what' is usually my response, particularly if the individual is not harming themselves or others.