That's an awesome article. Veins at the back of the knees, eh?

Ever since I sunburned the inside of my lower lip to a poufy blistered ouchie, I've retrained my face to an almost dimpled grin (smile aimed back instead of up so it takes more muscle which relieves the stress better, and exposes less soft inside-of-the-mouth tissue as well as a little less donkey-teeth and horse-gums). The windier or colder it is, the more of my face is included (you can smile with your eyes like that too, so a squint looks happy almost). So people see me riding on a nasty day and think I'm ferociously happy (okay, usually I am, my endorphin producers work really well).
I think it's had a significant change in how the world perceives me and if I'm feeling Californian, maybe it changes the karma of the world. I get smiles and waves (even half an hour ago when I was just getting my hot water for tea in the campus cafeteria) when I don't even think I'm greeting somebody.
And when you have to ride hard because you have a cooler and a blender and 10 pounds of ice and 10 pounds of ingredients on your bike and you're tooling along with the MOnday riders, they *really* think you're a partie animal! (They charged off to Philo... couple of us tooled along and tootled back and arrived almost the same time and amazed 'em all with our sweet concoctions. Like, bicycle lifestyle, DUDES!)