I may be crying a little after reading how junk food has different values and meanings dependent on families' socio-economic status.
"For parents raising their kids in poverty, having to say "no" was a part of daily life. Their financial circumstances forced them to deny their children's requests — for a new pair of Nikes, say, or a trip to Disneyland — all the time. This wasn't tough for the kids alone; it also left the poor parents feeling guilty and inadequate.
Next to all the things poor parents truly couldn't afford, junk food was something they could often say "yes" to. Poor parents told me they could almost always scrounge up a dollar to buy their kids a can of soda or a bag of chips. So when poor parents could afford to oblige such requests, they did."