Even water tastes sweeter when you're in love, new research finds. But not every emotion heightens the senses. Jealousy fails to bring out bitter or sour tastes, despite metaphors that suggest it ...

So surprising were Carter’s findings that it took her nearly 10 years to publish them—she simply didn’t believe her own results, and assumed she must have made a mistake.

It began when she stumbled upon an experiment which endeavored to make two strangers fall in love with one another. The study, conducted in 1997 by psychologist Arthur Aron, was entitled “The ...