While I agree with your husband's sentiments and probably his reasoning as well, my father use to say something similar, "Even the prostitutes and whores have parents." (meaning everyone has someone who loves them).
I must say that while these girls are quite beautiful, not every parent raises their children with high moral standards, in fact, many have standards that are quite low. Just look at the cheap women spattered across the Internet.
By the way, I have two pre-teen daughters. My worrying days are coming ... although they are currently very involved in church and school.
Agreed - we have a daughter in college and she would never dress (or undress) like this. Good luck with your daughters.