If someone kisses another person for a certain amount of time, this is much more effective in terms of hygiene than using chewing gum, as it normalises the level of acidity in your oral cavities.
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Human Body Facts
Non-FictionHave you ever wanted to know more about the Human Body? Have you ever wondered how much blood your heat pumps or wondered what's more sensitive than your fingers? This will take you on an adventure through the Human body in which you've never expect...
