This emoji was part of the proprietary / non-standardized emoji set first introduced by Japanese carriers like Softbank. These emojis became part of the Apple iPhone starting in iOS 2.2 as an unlockable feature on handsets sold in English speaking countries.
Maslow's (1943, 1954) hierarchy of needs is a motivational theory in psychology comprising a five tier model of human needs, often depicted as hierarchical levels within a pyramid. Maslow stated that people are motivated to achieve certain needs and that some needs take precedence over others.
Abraham Maslow. In the mid-1950s, psychologist Abraham Maslow created the famous Maslowâs Hierarchy of Needs where he explained that certain needs (in the lower levels of the hierarchy) must be met before a person will try to satisfy higher-level needs.