Probably. In my experience there is a wide range of personal behavior exhibited by doctors, lawyers, professors. My H wears ties and jackets when he teaches his undergraduate class; he is a well known professor in his field. Most of his male colleagues wear wrinkled, holey jeans and flip flops. I don't think the students learn any less or more based on what their professors wear. My gyn told me about his cancer recovery and we cried together, and he gave me a big hug. The next time I saw him, he held my hand and talked to me while holding on for about 10 minutes. I didn't forget to ask about how his boyfriend's doing. I know an attorney who works in the public defender's office and she wears tennis shoes, jeans, and tshirts to court. She has a reputation for counseling her clients well and for really fighting for them. Luckily for her, she's not assigned to the family law courtroom where they have a "dress code", which is always a little ambiguous for women, but the only woman on the bench in our smalllish town throws women lawyers out of the courtroom if they show "too much" cleavage.

A lot of what's professional behavior or clothing is opinion and subjective judgment by people. I don't believe there is any bright line rule that states that certain words or phrases or non sexual touching is not professional. Like most professions, T's have a code of professional conduct that includes not borrowing money from clients and not having s e x with them. As long as they are following their rules of professional conduct, I don't care as a general matter what they do. However, I think that T's should be aware that clients may be uncomfortable with less conventional behavior such as flirty talk or hugs, and create an environment in which clients can say what they feel about it. Whether certain things are professional or not, clients should always feel free to tell their T's not to engage in behaviors that they don't like, for any reason.