On holiday in Africa an Englishman decided to try swimming across the Congo. The natives were fearful for him and told him there were many dangers not least the crocodiles.
Boastful and confident he told them he had no fears and was sure he could not only swim across but also swim back.
To the amazement of the natives he did the return swim with no problems whatsoever. They told him that no one had ever done this before. "How come?" they asked.
"Quite simple," he replied, and opened his shirt to show his T-shirt on which was printed: "David Cameron is the best Prime Minister ever."