My T seems to have a 'therapy outfit', she wears the exact same outfit at about 90% of our appointments. Well, in summer it's a different one, but still.
I hope she washes them in between our sessions

I always wear fresh clothes when I go - I mean, I put them on just before I leave, I would never go in clothes that I wore all day. May sound strange but I think she likes my clothes, I see her watching them and she often makes a nice comment about them. May be just flattering me... I don't dress up special for her though.