Interior and Exterior Appearance

• The audience of Streeetcar sees both the inside of the Kowalskis’ apartment as well as the street, which emphasizes the tense relationship between what is on the outside and what is on the inside throughout the play. 
• The physical attention to inside versus outside also symbolically demonstrates the complicated relationship between what goes on in the mind versus what occurs in real life
• As the play progresses, the split between Blanche’s fantasy world and reality becomes sharper and clearer to every character in the play except Blanche, for whom the interior and exterior worlds become increasingly blurred.
• Social and class distinctions also point to the tension between interior and exterior. Blanche is trying to “keep up appearances” in all aspects of her life. She surrounds herself in her silks and rhinestones and fantasies of Shep’s yacht to maintain the appearance of being an upper-class ingénue, even though she is, by all accounts, a “fallen woman.”
•  She surrounds herself in her silks and rhinestones and fantasies of Shep’s yacht to maintain the appearance of being an upper-class ingénue, even though she is, by all accounts, a “fallen woman.”
• Blanche also calls Stanley a “Polack” and makes snide remarks about the state of the Kowalski apartment in order to maintain her own sense of external social superiority.
• Williams uses music to play with the boundary between the interior and the exterior. The “blue piano” that frequently plays outside evokes tension and fraught emotions inside the apartment.
• Although the blue piano is a part of the exterior world, it expresses the feelings occurring inside the characters. 
• Blanche sings “Paper Moon” in the bath offstage while, onstage, Stanley reveals to Stella Blanche’s hidden and sordid history.
• Music also allows the audience to enter Blanche’s head. When she hears the Varsouviana Polka, the audience hears the polka, even though it is only playing in her mind. Just as Blanche’s fantasy blurs into reality, Blanche’s point of view and the perspective of the whole play become blurred.