By way of apology, they later got dressed and played a free show to disappointed fans.
I suppose if I am attracted to men then they usually have more feminine qualities.
For 20 years now, New York-based photographer Spencer Tunick has been creating human art installations all over the world, calling together volunteers by the hundreds or thousands, asking them to remove their clothes, and photographing them in massive groups.
Collected here are images from several of his installations as they were being composed.
Warning: The following photos all depict naked human bodies, and are not screened out.
The campaign organized by Greenpeace is aimed at drawing attention to melting Alpine glaciers, a clear sign of global warming and man-made climate change according to the organization.