I agree that the meat and veggies causing vomiting b/c the "might" be toxic makes no sense, BUT, maybe the constant nausea/heightened sense of smell make you more likely to upchuck something that was slightly off, or just SO picky about what you try to eat that you only get the freshest most appealing nutrient dense foods available.

I also feel worst on carby crap, but, ironically that is the only thing that seems appealing once I am feeling crappy unless I really work hard to focus on something healthy and convince myself otherwise. I would love to know if women who grew up eating hunter gatherer style (and their mothers before them) actually have nausea regularly in their pregnancies or if it is a modern thing from generations of screwing up our genes with grains, etc... I know it is a hormonal thing and obvioulsly they would need the same hormones to carry a baby, but maybe they were not affected the same way. It just doesn't make sense to me evolutionarily speaking.