I also understand the negative internal reactions a T might have to intense ET from a client, when that takes over the space of therapy. I believe it is not so different from everyday life, when attraction is confessed but is one-sided, and the person attracted is trying to pursue it over and over. Like others mentioned above, I also experienced it many times and never enjoyed it much, often tried to avoid, etc. Especially being the object of elaborate and graphic fantasies and obsession that one does not reciprocate can feel intrusive and unpleasant. Of course a therapist is supposed to tolerate and handle it better, but I doubt that any amount of training changes the natural, gut reactions to such things. I actually feel that if a T finds such things repeatedly flattering and pleasant over time, that might be more of a sign of the T's issue - I think these can be exactly the most dangerous, unethical, abusive therapists. In my not-so-remarkable experience with ET in therapy, the T that reacted to it with outstanding curiosity, wanting to hear detailed fantasies, alluding to ET even when it was nowhere present on my mind etc was the one with serious countertransference issues that made me disappointed and cause me to leave therapy with him twice, second time more recently. Our conflicts were not ET-related, but some patterns were just present everywhere and I am not willing to tolerate that from anyone, let alone someone I am paying for a service.

Speaking of countertransference, I agree with BudFox in that it's a bit unnecessarily complicated and can be confusing. The "counter" part suggests hierarchy such that that the Ts reactions would always be a secondary effect to the client's transference. Obviously it is not always like that, and then we could also say that clients have countertransference to the Ts behavior, which is often true. Of course it's all semantics, but still.