It’s just the spiders under your skin.
But maybe it’s the nerves or capillaries that run through the layers of fat and skin, as walking shakes them up and gets the blood pulsing through. Even in fit people the skin shakes a little as it slides back and forth over the moving muscles. Once you get into a serious workout, there’s too much other sensation from the muscles and tendons, and the blood vessels are as busy and hopefully open as they’re going to get.
Bear in mind I have no actual idea, just speculating.
True, but also the consequences of living homeless in New England would force you to either come up with some kind of way to afford shelter or move south. Whereas more homeless people die on the streets in California than you might expect, but the perception is that you can live outdoors safely all year. So there’s less incentive to scrape together enough money for a home.
Add to that, very few people move to New England with a crazy idealistic view of their opportunities to make it big. If they move there at all, it’s because they have a job lined up. Dreamers crash and burn in California every day.