Humans are absolutely incredible beings. Our mental and physical health is damn near entirely built upon the choices we make. Do you eat right, live right, sleep right? Do you work productively and build or create? Or do you stifle, meddle and regulate? Do you love and give or do you take and hate? etc etc etc. When a human puts the power of the sum of their choices to work their physical, and mental, "immune systems" are so bleeping resilent and strong the Marine Corps would be impressed. The notion a gay ass fungus in a sidewalk crack, or the angle or amount of sunlight, is actually gonna have measurable bearing on the life of a well disciplined and regulated, properly living homo sapien is, IMHO, a bunch of soft headed, new school, been dumbed down by too god-damned many studies, madness.
Okay, next time I guess I'll have to say what I really feel. Grin.
All I can say is: 1) people really do vary in how they react to the environment. 2) There are four, not three, reasons why sunlight is lower in Seattle than in So.Cal. :)