There was just a show on that exact thing. Visual perception totally messes with our tastebuds. People were eating red Jello that was lemon flavored, so they were tasting cherry. But it was lemon! I think the show is called Head Games. It's a new series about brain research. It was kind of cool.
It also showed how a woman in a red dress gets all kinds of attention than when she wears the same dress in white.