Honeymoon

An elderly couple decided to celebrate their 50th anniversary in the same hotel and city where they spent their honeymoon. Before the act, he excused himself and went to loo and after a while came out laughing loudly.
''On our first night," the woman said, "you did the same thing and came out laughing. At the time, I was too embarrassed to ask what you were laughing about. Can you explain?"
''On that night while urinating, I made the roof wet. Today my shoes are wet."