It's the fashion designers who control what people wear. I used to think as you did, until I realized that our culture has made it nearly impossible for young girls to dress modestly. First of all, where does she even find modest fashions today, certainly not in any of the malls where they shop? Second, she would be ostracized by her peers if she did find them and wear them. Third, young people today have no real way to determine that what they wear is immoral, because they were born into this pit of filth.
I FIRMLY believe that it's the fashion mogels, their saturation marketing strategies and the clothing/retail industry itself who are to blaim for this mess. Lastly, our society has largely taken away parental authority in various ways. It's illegal to 'spank' your child, the Child Social Services can enter if you do, the public schools actually teach our children to report acts of "child abuse", (as in spanking), to authorities. Fatherhood and the traditional family went south with the no-fault divorce laws, FCC laws were downgraded and allowed TV programs to show every form of filth there is. Most kids don't stand a chance of embracing morality growing up in this garbage atmosphere today.
Let me help you here: The word you are looking for is "No".
I have a 10-year-old daughter. I retain veto power over what she watches, which clothes she buys and what she can do on the Internet.
She wanted pierced ears because "All the other girls have them!" I told her "no".
If she wants to buy "sexy clothes" because "all the other girls wear them!" I tell her "no".
Will her self-esteem suffer horribly because she doesn't conform to the mistaken notions of a bunch of other children? Hardly.In fact the opposite. She will learn the very real power of standing up for what you believe in, even when everyone else is against you. You can't buy that.
I'm not a prude, what she does when she's 18 is up to her. But if I don't try to instill the appropriate values into her, who will?