I wouldn’t have worn one either. Sometimes a waist is just not important. Especially when the dress is well designed. I like the way Vivienne Westwood is draping this. It’s not unflattering. And to me, it’s obvious that it’s more than just a sheet with a hole cut through for the head and the arms. Add to that a pair of good pumps and some Veronica Lake waves and this is working for me.  A belt here wouldn’t be added for style. A belt here would be added for vanity. Like – I AM NOT FAT. To me it’s way more fashionable to be ok with not having to shout that out.