Barracks Door

A man walked into a supermarket with his zipper down. A lady walked up to him and said, "Your barracks door is open."

He did not understand her, so he went on his way looking puzzled. When he was done shopping, a man came up and said, "Your fly is open."

He zipped up and finished his shopping.

At the checkout, he intentionally got in the line where the lady was, who told him about his barracks door. He was planning to have a little fun with her. So, when he reached the counter, he said, "When you saw my barracks door open, did you see a soldier standing in there at attention?"

The lady (naturally the smarter sex) thought for a moment and said, "No, no, I didnt. All I saw was a disabled soldier sitting on a couple of old travelling bags."