Clothes that don't show too much cleavage. I never really wear those anyway, but especially when I was seeing a male T, I didn't want 1) to notice him looking, and 2) for him to think that I wanted him to see. Same for short shorts, short dresses.

Then again, there was a heat wave over here last summer. I found myself thinking a week ahead about what to wear, whether it would be appropriate or 'too obvious' (at that point, things had shifted and I totally wanted to look good to him). Then I did wear short shorts, a loose high top (it was only a crop top in that there was the smallest imaginable bit of bare skin, the shorts were very high, and also loose).
My friends said it would be fine, I wore that daily anyway when it was so hot outside. I personally thought it would be too much, but I very happily went along with it when they said there was nothing wrong with it.

When I saw the older T, I would definitely prevent showing too much skin/wearing too much tight clothing, for the same reasons. To me, it feels like a way to prevent a certain dynamic, and to remain a person and not become someone to see in a sexual way. (Apparently, in my mind, I cannot be these two things at the same time, I suppose that is something to work on).