Rhythm Method
I am not sure when I first heard of biorhythms. Certainly I was a teenager then, maybe as young as 12. You read about a lot of things at that age and don't know whether to believe them or not. I'm still not sure about biorhythms. The idea is that everyone has a physical cycle that is 23 days long, an emotional one that lasts 28 days, and a mental one that goes for 33 days, all starting on the day you are born. This was less complicated and easier to accept than, say, astrology. It...