Actually..........it is a common joke there, ceptin' they don't have clothes on, so just imagine the bare butts.
I can't tell you how many times that someone brings this up when they hear you are from SD, which I was raised about 30 minutes from there. So this is cute, and expecially right now, because our little farm is 3 miles from the Canadian border in the Turtle Mtn's of North Dakota.
I have to tell a story of one of my many trips for work......
I went to a conference in DC about 10 years ago, and I met a lady from NH, that drew me out a map of a trip they took when they were on vacationing in SD, and you wouldn't believe, she included a very simply scetched picture of the back of MT Rushmore as to where they ended up, complete with the bare butts. It was too cute. Course when I got home, I purchased the sweatshirt and postcard to send her. She was just floored that I did this back to her. Good memories of home. Thanks