Abstract
Both positivity and negativity are important components for the development of mother-offspring relationship. The "inter-body antagonism" is an important biological framework to promote offspring's independence from mothers. Weaning, an achievement of nutritional independence in offspring, is a typical situation in which mother-child negativity plays an important role. Human mother-child separation is also actualized by complex sociocultural allomothering systems consisting of objects, persons and institutes. Human triadic relationship in joint attention by mother and infant to object is a basic element of the systems. The relationship is preceded by "Proto-triadic relationship" in which particular body parts are used as targets in human inter-body interactions as in a case of tickling play.Not only object but also person could be a target of attention in triadic relation, and exchange of perspectives with the person is essential in the human infant's cultural learning and establishment of social network. A special allomothering by a girl called Moriane in an island of Okinawa is an example of such allomothering.
