In the 19th century, it was common practice for a Japanese woman to dye their teeth black. They believed that this enhanced sex appeal and maintained healthier teeth.

It is believed that Shakespeare was 46 around the time that the King James Version of the Bible was written. In Psalms 46, the 46th word from the first word is "shake" and the 46th word from the last word is "spear".

Frogs cannot swallow with their eyes open.

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