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Published on Feb 24, 2009
Just in time for Valentine's Day, Wendy L. Hill, provost, dean of faculty, and professor of neuroscience at Lafayette College explains how kissing unleashes chemicals related to social bonding, motivation, and human stress, as well as sexual stimulation. With graduate student Carey Wilson, Hill measured levels of the stress-related hormone cortisol and the bonding-related chemical oxytocin in heterosexual couples who had just kissed. Stress hormone levels were reduced in men during kissing but not in women. Several copies of this video are available for interested TV stations.