A kiss (from Old English cyssan "to kiss", in turn from coss "a kiss", perhaps onomatopoeic) is the touching of the lips to some other thing, usually another person. The science of kissing is called Philematology.
Kissing is a learned behavior, related to the grooming behavior seen between other animals. Many non-human primates also exhibit kissing behavior.

All-Reviews.com - Butterfly Kiss - Review of the movie
Meta Description: [ Review of the movie Butterfly Kiss, starring Amanda Plummer and Saskia Reeves and directed by Michael Winterbotton ]
Chicago Sun-Times: Butterfly Kiss - Review by critic Robert Ebert.
IMDb: Butterfly Kiss - Synopsis, cast and crew, users' comments and related links.
Meta Description: [ Butterfly Kiss - Cast, Crew, Reviews, Plot Summary, Comments, Discussion, Taglines, Trailers, Posters, Photos, Showtimes, Link to Official Site, Fan Sites ]
San Francisco Examiner: Butterfly Kiss victim of genre - Barry Walters' review looks at why when men make films about lesbians they turn them into killers, but praises the acting.
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