This doesn't make intuitive sense, but Colorado University at Boulder Assistant Professor Lawrence E. Williams has found that simply handling a hot cup of coffee can change one's attitude toward a stranger.
People who had held a hot cup of coffee had a more positive impression of a person they read about than those who had held a cold drink.
Of course, touch also can evoke the oxytocin response. I wonder if heat does, as well?
University of Colorado at Boulder (2008, October 23). Physical And Interpersonal Warmth Linked. ScienceDaily. Retrieved October 24, 2008, from http://www.sciencedaily.com /releases/2008/10/081023144059.htm
Williams is a marketing professor, not a psychologist. But it seems that touching someone -- offering physical warmth -- is a good way to make a positive connection.