Look up charming in a dictionary and I’m pretty sure you’ll see this video:
Because we like to link everything to the brain over here at the Frontal Cortex, it’s worth mentioning that the number four also represents the outer limits of our numerical brain. Here’s Stanislas Dehaene, a leading researcher on the neuroscience of math:
Dehaene conjectured that, when we see numerals or hear number words, our brains automatically map them onto a number line that grows increasingly fuzzy above 3 or 4. He found that no amount of training can change this. “It is a basic structural property of how our brains represent number, not just a lack of facility,” he told me.