Don't blame the potatoes, Ron--on their own they have very little fat, low calories(I cup of diced potato has about 60 calories, on average) lots of protein and vitamins. It's the butter and sour cream that does us in;-)

Really, though, it is our sedentary life style. I used to live on the fringes of the Dutch Country, and those farmers eat more starch and a fat than you'd believe--However, they are not fat themselves. They do a lot of work, and a lot of walking.