On the topic of breakups...so what's a girl to do when she's feeling a bit emotional? Well, if you check out someone's thumb you can tell if they are more likely to reach for the Tim Tams or a good book.
A long, stiff thumb held close to the hand with an inward-bending tip (see Nicole Kidman's thumb) belongs to someone who has a lot of willpower and prefers to work alone. They resist sharing their feelings and are more likely to have solo hobbies like reading and meditation. It's easier for them to hold onto people and possessions than to let them go. It's good for them to learn new skills so they remember what it's like not to be an expert at everything.
A shorter, bendy thumb held away from the hand with an outward bending tip (see Britney and Oprah's thumbs) belongs to someone who prefers the support of a group. They are more open with their feelings (i.e. they are willing to cry in public) and love the comfort of food and friends. They will be generous with their material posesssions, time and money, to the point of not keeping anything for themself.
Palmistry alert: What type of thumb do you have? Do you prefer to work alone or with a group? Is it easy or hard for you to give things away like love and money? As you can imagine it's easier for people to get along if they if have similar thumbs, but more often than not you'll find that opposites attract! :)