When I was at Girl Scout Camp, I heard the story of 3 men who went to a doctor, and asked him to make their penises grow larger.
The doctor gave them some pills, and told them to come back in a week.
The first man came in and said, "Mine grew an inch."
The second came in and said, "Mine grew 2 inches."
The third man came in twirling it over his head, and shouting, "Wahoo!"

A Girl Scout may be clean in thought, word, and deed, but never in jokes.