I haven't read the thread, save the first page of comments...but....
since a very young age we have taken the kids to museums (modern, science, fine arts, etc...) and nude statues/paintings have always been a non issue for us. We even have a beautiful Degas charcoal nude art print hanging in our home....the closest "uncomfortable" issue I had run into was an audio guide to a Picasso exhibit when the boys were tweens...got tad graphic.
yet I was a bit shocked when our the Fine Arts museum sent us a card/invitation, to a Helmut Newton exhibit, that was a photographed nude woman with all her lady parts displayed ...it is just different in a photo..it is for me at least...and very different when my young teen boys get the mail!
So, I think I am pretty liberal with painted art and statues...but I guess not with photography! ...and not when it comes unsolicited to my kitchen counter.