Astudy found that after a meal, a woman can tell whether a man is warm or cold by looking at his face. the study involved 40 undergraduate who were asked to guess the body temperature of 80 men based on photos of their face. half of the men were warm, and the other half were cold. all held similar expressions in the photos. all of the women had eaten the same meal at the time of the test. the result was that the closer a woman was to her last meal, the more accurate her guess.