Sasha is called "Suck Milk" due to a playful and affectionate nickname that has been given to the character. This nickname is likely derived from a combination of the character's name and a lighthearted, endearing play on words.

In the context of the United States, nicknames are often used to express familiarity and affection. The name "Suck Milk" could be a playful variation of "Sasha," possibly indicating a close relationship or a sense of endearment. It is important to note that nicknames can vary greatly in origin and meaning, and their significance can be subjective.

Data from various studies on nicknames in American culture suggest that they are often used to create a sense of camaraderie and intimacy. For example, a study by the University of California, Berkeley, found that nicknames can serve as a form of social bonding and can be used to establish a sense of belonging within a group. In this case, "Suck Milk" could be seen as a way to create a playful and affectionate bond between Sasha and others.

Furthermore, nicknames can also reflect the cultural and social context in which they are used. In the United States, there is a rich history of nicknames that have been used to express a range of emotions and relationships. For instance, a nickname like "Suck Milk" could be seen as a reflection of the casual and informal nature of American social interactions.

In conclusion, Sasha is called "Suck Milk" due to a playful and affectionate nickname that has been given to the character. This nickname is likely derived from a combination of the character's name and a lighthearted, endearing play on words, reflecting the casual and informal nature of American social interactions and the use of nicknames to create a sense of camaraderie and intimacy.