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Pubic lice (crabs) are usually spread through sexual contact. You cannot catch them by using a public toilet.
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Excessive alcohol use costs the country approximately $235 billion every year.
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Blood in the urine can be a sign of a kidney stone, glomerulonephritis, or other kidney problems.
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Certain chemicals, after ingestion, can be converted by the body into cyanide. Most of these chemicals have been removed from the market, but some old nail polish remover, solvents, and plastics manufacturing solutions can contain these substances.
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Sperm cells are so tiny that 400 to 500 million (400,000,000–500,000,000) of them fit onto 1 tsp.