There are so many assumptions that frame our thoughts and we don't even realize it. My friend recently told me he was worried about going paleo because he didn't want to become a "fragile flower" like me, who could never eat greasy food at our local bar without feeling completely ill. I kind of had to acknowledge that that was a downside to eating a paleo/ancestral/human diet, at least within the context of our conversation. But I've since come up with what I think is a good analogy for thinking about this.
Let's say I'm taking small but not insignificant doses of a poison day in and day out -- rat poison, arsenic, something like that. I started at a very small dose and gradually increased it, so I have built up a resistance to it. But it has accumulated in my system, and it's wreaking who knows what kind of havoc on my body. One day you come visit me and I give you some food with the poison in it. You eat it, and you feel like crap, and it's immediate and violent. Finally, while you're on the bathroom floor throwing up, I say to you: "Man, what is with your diet? You are such a fragile flower. I'm glad I don't eat like you."
Is it just me, or would that be kind of a ridiculous thing to say?