I get it in the spring.
It's that first day you feel like getting in gear. You stop thinking about eating after work and go for a long, heart-pounding walk. Better yet, a bike ride. And when you get back, you wash your car, do some yard work and crank up some old music in the garage.
When you come inside, you feel like you're 25 years old again.
You might continue listening to the same music the way it was meant to be heard.
And if you drink that beer fast enough, you might even end up making a plan to move to Canada.