ABCD

Pd Regional Population Density (e.g. 18,600 mi^2) Xf Average Person's Frequency of Sex (e.g. 80 Year) Xd Average Duration of Se (e.g. 30 Minutes) r=sqrt(2 pi*Pd*Xr*Xd) On average, someone within distance r of you is having sex [[Man standing at easel]] Man: Mmm, That probable couple 150 meters away is so hot. Oh yeah, theoretically work it, baby. From out of frame: Hey! No statistical voyeurism! {{Alt Text: I love how google handles dimensional analysis. Stats are ballpark and vary wildly based on time of day and whether your mom is in town.}}