I have never wanted to give a therapist a present, and accepting something from the therapist would be weird for me. I go there, I talk, they do what ever they do, the agreed upon amount of time passes, I pay the agreed upon amount and I leave. And then I come back and do it again the next week.
I don't see why I would want to give them a present. I pay them and go back to them.
Having said that, all the ones I have seen have or do accept at least small sorts of presents.