All that said, an unwanted focus on the body is certainly inappropriate and is something that happens too often. And commenting on someone's appearance when you can't see them at all is just a
...if a person's face isn't visible, are they undeserving of compliments on their appearance? Is it only acceptable to say someone's gorgeous once their face is revealed?
This isn't to say that beauty isn't in the face, but your body can be gorgeous as well. And although there's a lot to be said about objectification and dehumanizing of women...