I agree with this, for two reasons which I suspect aren't the same as yours.

My rational reason is that I think for me it would be all too easy for therapy to become a substitute for growth instead of a motivator. At the moment I don't have any desire to hug my therapist but if I did I would rather just live with the feeling and figure out how to get it in my "real" life, for lack of a better word.

The nonrational reason is that how I'm slowly starting to interact with him verbally, like what I'm telling him, is so intimate and vulnerable that hugging would be - overkill? too much? Just seems off, like adding yin to yin or something.