New York has actually been doing this for 5 years. The official website is great and has tons of information: http://www.cartsofbrooklyn.com/

This especially hard in New York City where regular grocery stores with easily steal-able shopping carts are a rarity.

Thanks Joel! We love this toy over at Babeland, it's been a favorite since we got it in. The curve, the speeds and the pulsing make it a lot of fun. And, it's rechargeable - more and more sex toys are developing this feature and thank goodness because we're all tired of batteries.

I write about our other new toys over on Babeland's blog: http://blog.babeland.com

The other thing that's important to remember is that this is not experimental. Since you cannot randomly assign people to be either overweight or skinny, you also get a whole host of factors that those two groups could share that are not either weight or disease (health seeking habits, health care habits, etc). Isolating weight and disease is impossible.

This means that you can't say "overweight people have a lower death rate", you can only say "overweight people are ___ times more likely to have a lower death rate". I don't know what that rate is - it could end up being small.

It also seems to me that in older people, BMI would be a very inaccurate measurement as many older people who have chronic diseases are thinner. This would skew the results dramatically.

Lastly, it seems that the diseases overweight people get are ones that have long been associated with weight gain whereas the diseases that "normal" people get have a host of causes (genetics, chemical exposure, etc). If I had to pick, I'd rather stay at a healthy weight and take my chances on the unknown than gain weight and know I will have to live with Diabetes.