A man's craving for metal that led him to swallow 40 knives may sound bizarre, but such strange cravings can be symptoms of an eating disorder in which people ingest anything from dirt to talcum powder. The 42-year-old man in India said he had consumed the knives over a 2-month period, according to CNN. Some of the knives were folded up when the man ingested them, but some were unfolded, and extended to about 7 inches (18 centimeters) long. The man required a 5-hour operation to remove the knives. Because some of the knives were open, the man was bleeding...