According to Dr. Lindlahr, a famous naturopath, two hours before and two hours after midnight are the most valuable for sleep of all the twenty-four hours of the day. In these four hours, mental and physical vigor are at their lowest ebb and sleep is soundest and most natural.

It is believed that three-quarters of our sleep consists of what’s called ‘slow wave sleep.’ The restorative processes occur during this time. The remaining quarter is taken by what is called ‘rapid eye movement (REM) sleep.’ It is also called paradisiacal or dreaming sleep and it comes in episodes of about 20 minutes duration about five times in a night. It involves dreaming, irregular heart rates, raised blood pressure and erection of the penis. It is in this phase of sleep that normal healthy young men may have wet dreams. Both forms of sleep are considered equally important, being normal sleeping rhythms.