Most people in Illinois are aware of what kind of partner they're likely able to attract. Therefore, they may seek relationships with people on par with themselves when it comes to physical attractiveness. Still, there are some people who prefer to seek more attractive partners. Should relationships like this result in marriage, however, the odds of a long-term success may not be so good. This a conclusion based on research from various sources indicating that physically mismatched couples may be more likely to untie the knot.