This recent xkcd should have you all reaching for your calculators.
I had to look up the population density in my area…it’s 18. Not 18 thousand, just 18. When I plug that number into the formula, I got a value of 4,500 meters, almost 3 miles. The parents of our students will find that a reassuring statistic, I hope.
Of course, the formula lacks a temporal component — that mean distance is going to vary with a circadian rhythm, I would think, with peaks in the evening and early morning hours. Rather than a static number, it should be a function that measures a kind of hourly flux, with all the sexy time people hovering in close around dusk and receding during the day.
Hmmm. If XF included masturbation, that number would be much higher…