I don't mean to split semantic hairs here. Maybe there really might be a substantive difference between what you were talking with your T about and talking about sex. You might use similar vocabulary but the matter of what you were talking about sounds like abuse and power games where sex was the medium.

I think there's a real difference between those kinds of conversations and ones where you're talking about your sexual self and desires and needs. Those are the kinds of conversations I think of as having sex per se as the subject. Certainly abuse can affect that self and those desires and needs.

Maybe I'm just pointing out in a long winded way that there's a huge difference in therapeutic conversations about wanted vs. unwanted sexual experiences. Maybe some people would feel more comfortable (or less uncomfortable) with one rather than the other. It would be interesting to think about the reasons behind the differing comfort levels, e.g. believing one merits therapist attention and the other does not etc.

Just an idea.