An average human being is said to spend approximately three minutes every day brushing the teeth. But have you ever wondered why you take that extra effort in dabbing that smear of toothpaste on your brush? If our forefathers maintained oral hygiene by merely chewing on twigs, then why undergo the mundane routine of brushing? Well, apart from the fact that a welcoming whiff of morning breath is not something anyone would like to start their day with. That, almost insignificant blot of toothpaste does in fact have some relevance. While some facts are well-known, some may be quite eye-opening.