Of Stairs and Modesty

7-yr-old girl.  Her classroom is on the top floor of a 3-storey building with external stairs.  As we start descending the stairs on the way to her lesson, both of us bend to keep our skirts in place - the wind creates rather a 'Marilyn' effect and our hands rushed to our knees for modesty.

Girl: Ooh, I hate these stairs.  That always happens, and if there are boys behind, they can see our undies!  It's not very ladylike.
Me [smiling]: I agree.  That's not the kind of thing we want happening.
Girl [thoughtful]: Unless... Unless we were in a play, and we had to have that happen...
Me: I suppose...  But I'm not sure that's the sort of play we would really want to be in, do you?
Girl [rather primly]: No.  Of course not.  Not. Very. Ladylike.