How is it that (I guess) probably since the renaissance women wore low necklines, especially the wealthy and the royalty (the people at traditioninaction.org consider Marie Antoinette a "good catholic" even though she has really low necklines in her portraits), and I guess wasn't considered immodest or sinful, but since several centuries ago now it is sinful and immodest? I don't know when exactly this changed but all through the 20th century up to right before Vatican 2, low necklines were considered immodest and sinful, but it seems that it wasn't before.