Most serious researchers concede that the effect, if it exists, is very small and attribute the absolute surety of law enforcement, EMS and healthcare workers to selection bias. ["Why does my toast always seem to land buttered side down?" The answer is, it doesn't. We're just more likely to notice when it happens. "Then why does the clock seem to show 11:11 and 12:34 more often?" Clearly, this can't be true...]
"A meta-analysis of thirty-seven studies that examined relationships between the moon's four phases and human behavior revealed no significant correlation. The authors found that, of twenty-three studies that had claimed to show correlation, nearly half contained at least one statistical error.Similarly, in a review of twenty studies examining correlations between Moon phase and suicides, most of the twenty studies found no correlation, and the ones that did report positive results were inconsistent with each other."
https://en.wikipedia.org/wiki/Lunar_effect
The suction cup was used on one of my sons' heads almost 30 years ago to this day. seeing his wildly extruded head and body, I was sure he would not survive. Seems fine, and about to get his PhD. So on the basis of a statistic with a sample variance of ∞ maybe that thing needs to be used on more kids...
Come to think of it, my middle child was suctioned from his mother and he is getting straight A’s so you might be on to something. Freegards!