As a birthday gift, a few friends got together and gave me a facial. What a luxurious gift, I must say! It was lovely, being pampered for an hour, coming out with my face feeling like velvet, and my body like a marshmallow. When it was finished, I asked the esthetician how often she recommended having this done. She said every four weeks. I said Four Weeks! If I made it in four years I would feel fortunate. But apparently some people do. I wonder if it is covered under MSI, as health assurance.
Then I looked up the number “four” in Wikipedia. Among many many other things, many of them being mathematical, it said: “Four is the only number in the English language for which the number of letters in its name is equal to the number itself. This is also true in several other languages.” Interesting. A very sturdy number.