Have you ever witnessed nonchalant nakedness?

When I was in middle school, a friend and I was going door to door selling candy bars for some fundraiser. We knocked on a door at an apartment complex and was greeted my a man who just peaked his head out. He agreed to buy a candy bar and opened the door the rest of the way. To our surprise, he was completely naked. Old, wrinkly and NAKED. We were so shocked, we didn’t run away. We stood there while he counted out his pennies, nickles and dimes.

Have you had a similar experience? Have you accidentally seen some one naked, who was completely nonchalant about being exposed?