Male sexual cycles

There is little info published about male sexual cycles. They seem irregular and confusing. This entry is an attempt to sort some of them out.

Online research tells me that men have a cycle of high and low testosterone that runs about 30 days. Beards grow faster during certain parts of the cycle.
It is overlaid with another weaker testosterone cycle that runs about a week.
Testosterone level is also raised by sexual activity, winning competition, exposure to new women, food and other things.

Then there is the ejaculation cycle. Sexual energy, tension and fluids are all discharged at ejaculation. Then they build up again, rising like a sawtooth waveform that suddenly drops again at the next ejaculation. Normal frequencies for that cycle run about once per day during teens and twenties. As you age, the frequency gradually drops to 1 per week or two in your 50s.

Overlay all these cycles, add the events that modify the cycles, and you have a nearly unpredictable waveform. However, it is useful for a thoughtful guy to understand these patterns within himself.