Human interactions would not have been very up-close and personal had the Egyptians not figured out a way to spare us those nasty oral odors.

They are believed to have started using a paste to clean their teeth around 5,000 B.C. and were among the firsts to use twigs with frayed ends as toothbrushes. They also made the world's first breath pellets using myrrh, cinnamon, frankincense and honey.