Along the lines of what Dudley said, I was watching 20/20,I think it was, the other night, and they were doing a story on food psychology (sp?). A food scientist did a survey with his own college intern staff where he asked them to sample two types of strawberry yogurt.

Both types of strawberry yogurt were merely normal yogurt mixed with chocolate syrup.

When questioned later, all 5 or 6 of the interns were convinced that they had been eating strawberry yogurt. One of the funny things is that all of these interns worked for the scientist and were familiar with the "angles" of his work, and even so, none of them knew the jig was up.

I'm sorry for that.... I never get threads off-topic.

Excerpt from Robert Crais' "The Monkey's Raincoat:"
"She took another microscopic bite of her sandwich, then pushed it away. Maybe she absorbed nutrients from her surroundings."