Sweating when talking to a romantic partner could be a sign that he/she is not "the one". Researchers in Illinois gave dating, engaged, and married people questionnaires about their relationships and measured heart rate and skin conductance (which measures sweat) during interactions. Sweat is a sign that a person is trying to control their behavior. "It's a problem if you need to inhibit yourself greatly while having a conversation with your partner about the kinds of things that you would ordinarily be talking about and trying to resolve in your daily lives," says co-author Dr. Glenn Roisman. [UPI]