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Did you know?
Egg cells are about the size of a grain of sand. They are formed inside of a female's ovaries before she is even born.
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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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About 600,000 particles of skin are shed every hour by each human. If you live to age 70 years, you have shed 105 pounds of dead skin.
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People often find it difficult to accept the idea that bacteria can be beneficial and improve health. Lactic acid bacteria are good, and when eaten, these bacteria improve health and increase longevity. These bacteria included in foods such as yogurt.
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After a vasectomy, it takes about 12 ejaculations to clear out sperm that were already beyond the blocked area.