I agree. I was putting words in Kat-of-a-year-ago's mouth.

Personally, I try to expect people to own their own Stuff. In this case, that means that if we had a friendship where they were comfortable with my casual nudity before they revealed having an interest in my and I turned them down, I expect they will either continue to be comfortable with such, or they will inform me and ask me to change my behavior accordingly. At least, that's the goal; my reality doesn't always live up to my ideals. I certainly expect them to recognize that if I do inadvertently hurt them in this manner, it's through ignorance, not malice, and will not be repeated if the ignorance is corrected.

I do think a lot of people operate in such a manner that the revealing of interest causes these sorts of fundamental changes. Such is life.