A Kiss to Help Forget a Fight-

http://sciencenow.sciencemag.org/cgi/content/full/2007/122/2?rss=1

Animal behaviorists have studied squabbling among numerous mammalian species, particularly primates, which after a fight often seek comfort through mutual grooming with an animal not involved in the row. This tactic is believed to reduce stress. Chimps, bonobos, and a few other mammals go a step further:...