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Photo: Yale Center for British Art, Paul Mellon Collection

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"I just can't make this decision without you."
Everybody likes to be liked for who they are. But there's a special kind of glow that comes when somebody likes what you think, when you know that what they want is your help in making a decision or in figuring out a messy problem. This may also be another way of expressing that most honored of human emotions: trust.

Next: 5 life-changing revelations anybody can have