Nutritionally speaking, you are what you eat.
Our bodies are made up of the water, the oils, the sugars, the proteins, the so on and the so forth and the etc. etc. that we ingest with every passing day. Many people have expanded on this concept: Describing how we're sickening and dying because the world is sickening and dying. There are many who explain that we cannot wander through a world filled with gasoline fumes, partially hydrogenated oils, daffodil-rice and the like without absorbing some portion of the wretchedness.
But I'm curious if it goes any more than simply skin-deep...If our personalities come from the electric synapse relays that run amok in our cranial muscle (apologies to the religious types for leaving god out of the equation), may we infer that what we eat becomes who we are? Do we absorb some of the moral turpitude of Monsanto when we ingest BGH-flavored milk? More inertly, are we sweeter for having eaten cherry-pie?
If mutton makes us tough, while lambchops make us docile, could that be the explanation behind years of generational differences? The Baby Boomers rose to power under the auspices of pork, pork, pork, tart tomatoes, liver, pickled veggies and deviled eggs...is it any shock that this group grew up to be a prickly argumentative bunch with a yearning to bring down "the piggies"? And Generation Y, with Soda Fountains o'er flowing...well, are we surprised at our own, dare-I-say, 'soft' malleability? I mean... it's been under the guidance of the chromosome generations that we've really allowed all that artificial genetic engineering (I mean, come-on, I get the whole donkey+horse = ass thing...but how exactly were tomatoes and fish planning to mate in real-life?*)

It would be nice to think that having a Lil' Debbie might make me suddenly more adorable or that eating a May West (spelling changed to protect the not-very-innocent) might make me a tiny bit more coy...but the proof is in the puddin', as they say...
When it comes to putting things in our mouths, we never really do know what we're getting into.
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*Most activists usually refer to the dreaded "FishBerry"; But I am an equal-opportunity slanderer, so I wouldn't ever refer to an urban myth, if I can help it...destroys my credibility, you know? But here's a great explanation of the genus behind strawberry-fish, if you're interested (bonus: a photograph of the feared straw-beast!)