Warm Hands, Warm Hearts - ScienceNOW
http://news.sciencemag.org/sciencenow/2008/10/23-02.html
Holding a hot cup of coffee warms your hands on a cold day--but it may warm your heart as well. Two experiments, reported in the 24 October issue of Science, suggest that the physical feeling of warmth makes people judge others more favorably and act more generously.