LT, I'm sorry you're struggling with this. I don't know the full situation but on reading your T's response I wanted to offer one thought, which is I think it's good your T hasn't agreed to stand like you asked. I don't mean this to sound uncaring or anything like that, but the fact he has refused to do it means that you and him can have a conversation about it, if you're so willing. If he simply caved in and said yes, okay, I'll do it, the emotion will settle inside you, but then the opportunity for looking at what standing versus sitting means to you is less available once the feelings die down. In many cases tension in therapy offers the chance to really look at what is going on for you rather than covering it up with a sticking plaster until the next occasion presents itself (and it usually does). Personally I think like many others, your T sounds professional and good with boundaries, he is right that he doesn't have to change his behaviour for clients, but he is willing to discuss all this with you, which is essential. It will likely get messy but herein lies the opportunity for growth, albeit painful. I hope you and T can work it out.