Picture This-Yikes!

Ok, so picture the following conversation while looking at this face.

Recently my room was not quite so clean as it is right now. I was cleaning a little with my precocious almost 5 year old watching. I picked up a certain piece of underclothing that, shall we say, she would never see me in and put it in the drawer. Carlyn grabbed it and held it up to her exclaiming, "Mommy this is the most prettiest dress you have! I love it. I just love it! You should wear it to church on Sunday!" I almost died laughing as I explained to her that it wouldn't be appropriate to wear to church as it wasn't modest enough. With her smart little brain working too hard she said, "Then what is it for, if you aren't going to wear the dress to church?" What do you say to that? I laughed my head off and I don't think I said anything except, "You'll understand when you're older." What do you say to that???