But before any of these inquiries are but a twinkle in Isaac's eye, I know I'm going to face an interrogation about vegetarianism. At some point soon, he'll ask why our family doesn't eat this stuff called "meat" that's everywhere. I have my substantive answers already lined up, so I'm not worried about what I'll tell him. (We don't eat meat because it's unhealthy, environmentally irresponsible, expensive and inhumane.) With this question, I'm more concerned about the prompting. Why is he almost certainly going to ask at such an early age? I think I know the answer -- and it's not the ad campaigns that make meat seem like a rational choice ("Beef: It's What's for Dinner"), a healthy alternative food ("Pork: The Other White Meat") or a compassionate cuisine decision (Chik-fil-A's billboards, which show a cow begging you to spare his life by choosing chicken). No, Isaac's going to have questio...