Diana accepted the explanation of "big girls sometimes need Band-Aids" with no anxiety or fear. I put the pad (the Band-Aid) in her underpants and off she went. In fact, she was much more upset when I told her just now that she didn't need a new one. So now she's going to be all sad and out of sorts because I won't let her wear one she doesn't need. In fact, she just came up to me and said, pitifully, "Diana is soooo sad."
I have not yet explained the facts of life to her, because she's not intellectually mature enough to understand what she's being told. She's not even mature enough to hear my very simplified version, that she only needs to wear it for a few days a month, when she bleeds. She's now crying and whining and using her repetitive speech to comfort herself. *sigh* So I gave in, put a pad in her pants, and told her no Band-Aid tomorrow. I was so surprised at her easy acceptance of the pad, it never occurred to me that NOT having it would present a problem.
Interestingly, she got hers right before I got mine. I'll have to continue to watch and see if our cycles continue to mesh. It will certainly make things a little easier to predict, since I can feel the "symptoms" and recognize them, even if she can't yet.