When I was twelve, I started to be obsessed. I theorized that this obsession would continue, growing stronger over time - frequency of thoughts would rise first, and then so would magnitude. Therefore, I concluded, it would be impossible for me to escape the reality that I needed to transition, because eventually I would become so obsessed that I would literally be forced to do it.
A positive-feedback reaction.
I still feel obsessed, and I probably will until my SRS... perhaps beyond that, as my physical transformation won't be complete for a while afterwards. I may be underestimating what SRS does for the mind, however, when I make that speculation.