Last September, in Khartoum, Sudan, a rumor surfaced that Westerners were going about town, shaking the hands of Muslims, and thereby causing the Muslim's penises to disappear. Really. This was reported in the Arabic language Al-Quds Al-Arabi and translated by the Middle East Media Research Institute (memri.org).
The rumor spread, mass hysteria ensued, hospital rooms filled with nervous men and police arrested some 40 foreigners on suspicion of sorcery. Only when the health minister publicly discredited the claims did quiet return to Khartoum, but not before a Sudanese columnist blamed the sorcery on "an imperialist Zionist agent that was sent to prevent our people from procreating and multiplying."