I think the articles misses those points: Does this feeling appear in animals too? Does it have biological sources and/or evolutionary benefits? Avner 11:31, 3 April 2008 (UTC) Avner

If you have sourced (with references) material on these points that would make a valuable addition to this article. Dr. Becker-Weidman Talk 12:48, 3 April 2008 (UTC)

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