When I was younger, I had this fantasy and wish to find someone I could tell anything and everything to, one single person who would be interested in exploring the rabbit holes of my sometimes bizarre and definitely non-linear thought processes and inner world in general, without limits. I learned it first hand how it is not a good idea to do it with one single person for me, from a romantic relationship lasting several years in my early 30's. It became obsessive, addictive, and lost touch with reality.

And if it was not possible (and in fact quite destructive) in that sort of relationship for me, it would definitely not be a good idea with a therapist, in the very limited and asymmetrical construct therapy provides. So in therapy, I pretty much handled it the same way stopdog described above, although I did often get carried away with sharing all sorts of things with the Ts via email that I regretted afterward.