In psychoanalytic theory, it's the first & most primitive stage of development
The id, the most 
primitive of the three structures, is concerned with instant gratification of ... cream 
right now") and superego ("It's wrong to take someone else's ice cream") and 
decide to... [DOC] [TLE] Sigmund Freud - Psychology History [PAR] Sigmund Freud was one of the trailblazers of modern-day psychology.