A professor who specialises in penis enhancement has recently announced free treatment, as many of the U.K. males are reputed to only have four inches.
To avoid embarrassment by asking these men to visit his clinic, he has suggested that all the males in this category who would like to have free enhancement, should display a small white flag with a red cross on their cars, two flags if you are desperate and he will seek you out discretely.
So that's what those flags are?