>>938226799
The human mind is complex and dynamic, I'm still acquiring new sexual tastes at the age of 31, and moving on from old ones that just don't do it for me anymore.
I think a lot of these guys find a trap or tranny that is especially cute or submissive and that opens a gateway in their mind. They get aroused, but feel confused and unsure because this 'girl' has a cock. But, they get aroused enough, or they see fellow /b/tards gooning over them as well so they tell themselves it's okay. The taboo nature of it also arouses them in a way they haven't felt before. So they nut, and this forms deeper connections in the reward centre of the brain that makes them seek out more, and more.
Each step of the way to "dominant coded(big dicks, degradation)" may have a similar nature, i.e. some initial arousal at what they are looking at (but unsure), the taboo nature increasing arousal, and fellow gooners encouraging it. Another nut, another batch of neural connections, etc.
It's worth noting that some guys can like cocks and be dominant, and some can like cocks and be submissive. And, someone may become more dominant or submissive throughout their life depending on life experience. For example, someone who experiences a lot of Ls, or begins to get controlled by their partner (men sometimes 'get weak' for a woman, then they get dumped - an L), or doesn't have masculine guidance in their life might be more likely to become submissive. The degree of submissiveness and the degree of their attraction to cocks, and being exposed to dominant coded tranny porn is what will determine their attraction to it.
Then perhaps the really submissive ones who get off on the taboo and naughty nature of being a trap (after being exposed to it pornographically) might become trans.