If some people think, "Why am I eating a dead bird soaked in poop?" I think if some people get disgusted by that, it's all to the good. Their coronary arteries will be healthier.

Dogs have a sense of smell much greater than ours and they're much faster than we are. We have fairly dull senses, fairly slow locomotion. In our Olympic trials, we celebrate speeds that would be an embarrassment to a bird or a dog or another animal.

In China, because China is gaining wealth, rice consumption is way down. Rice is a poor person's food, and they're eating less of it. To wait in line at a fast food chain is cool. And they haven't historically had weight problems. So they don't have this culture of, "I need to lose weight."

While it's certainly true that many people think that dairy doesn't have a cost to the animal, it's because they never went to a dairy farm.

The important thing is that while heroin and cocaine and tobacco and every drug and junk food cause dopamine release, there are healthier ways that you can put this into your life. And the three big ones are intimacy ... physical activity ... and the third thing is music.

In my own life, I decided to leave meat off my plate in medical school, but was a bit slow to realise that dairy products and eggs are not health foods either.

Not only are the studies themselves often lacking even face value, but they also drain badly needed funds away from patient care needs.