It turns out that just as both Tammy and Mandy like horses, they also both like horses with horns on their heads that aren’t real; but they are each interested in different types of unicorns. Sigmund Freud, the guy who studied Mandy’s shelves, again helps to explain the variation in unicorns. The anal stage is the term Freud used to describe the development during the second year of life, in which a child's pleasure and conflict centers are in the anal area. This stage is exemplified by a toddler's pleasure in controlling his or her bowels.
When there is excessive gratification in this stage, it leads to the development of an extremely generous, unorganized personality called anal expulsive. Those who are anally-expulsive are said to have been liberally trained at using the toilet as children. The demand for perfection was not strictly adhered to (by the parent or parents). An anal expulsive personality is broadly defined as exhibiting cruelty, emotional outbursts, disorganization, self-confidence, liberal-mindedness, generosity, rebelliousness and general carelessness. The anal expulsive unicorn is the unicorn that Tammy likes. Tammy wears this unicorn, especially on a t-shirt or tattoo, as a big ‘fuck you’ to her audience. They are usually accompanied by lightning or something equally as tough and out of control, and are commonly airbrushed. The unicorn is both feminine and rough, often like Tammy herself. The anal expulsive unicorn:






When gratification does not occur in the anal stage, the individual becomes extremely organized and develop a personality called anal retentive. Freud theorized that children who experience conflicts during this period of time may develop this personality trait associated with a child's efforts at excretory control: orderliness, stubbornness, a compulsion for control, as well as a generalized interest in collecting, possessing, and retaining objects. Mandy likes this type of attractive, clean and straightforward unicorn. It is easy to see why Mandy likes unicorns because they satisfy her need for pretty and happy childhood mysticism, as well as appease some derailed or repressed sexual desires. The anal retentive unicorn:




