Feb 20, 2013 3:23pm

Naked museum visitors look at pictures of the show “Nude Men from 1800 to Today” during a special opening to friends of nudism at the Leopold Museum, Vienna, Austria, Feb. 18, 2013. (Ronald Zak/AP Photo)

Naked museum visitors look at pictures of the show “Nude Men from 1800 to Today” during a special opening to friends of nudism at the Leopold Museum, Vienna, Austria, Feb. 18, 2013. (Ronald Zak/AP Photo)