I'm not sure if you watched the Horizon program, but if you did, I wonder if you had as many light bulb moments as I did. It was crazy; they were going off like a ball bearing setting off the lights on a pinball machine. Each time a statement was made its core rang true with me.
These are typically our vulnerable times, the times when we reach for that one reliable friend, the quick fix that sustains us and never lets us down. It's often only later that we berate ourselves for being weak and picking the 'easy' option that's not such a good friend after all.
If your child is fat, blame granny (and I'm guessing also granddad!) For years you've dumped them on your aging parents, collected them when it suited you and now you can blame them for making your kids fat.