My last T had interest in some substances that make one high when he was young but don't think he practices therapy with that mindset He did appear quite enthusiastic sometimes, clearly enjoying the interactions, but not manic. I liked that because I did, too. It was much more upsetting for me when my first T would sometimes just sit there staring at me speak and looking apathetic. Not offended at all if someone finds exploring difficult personal experiences exciting because I do, too. I think I get when someone is really into what they are doing and very interested, it's hard to stop. The mental stimulation can indeed create something akin to a 'high', I think. But I'm not the best person to ask perhaps because I had addiction problems (main issue I sought therapy for).