I couldn't possibly say that this applies only to people with kids, because that's just simply not true, but when you "all of a sudden" do have another little mouth to feed it gives you pause for thought. "What am I actually putting into my body? What are we actually putting into our child's body?". It gives you just one more reason to re-examine your dietary habits and while I'm certainly far from being the healthiest person in the world - heck, I sure do love my butter, olive oil, chocolate...