I want to not be a body anymore. I want to slick warm and affectionately away from the self I was taught to be, sliding over their conversation and out the window, into mother evening.
-- Narrator (Ponyboy) (negative three)

Importance: This quote comes at the very beginning of the novel and articulates Ponyboy's distaste for the body he was born into and the notion of gender in general. At this point, he is still talking with Toni, who is affirming a lot of his views on his own gender and the incompatibility of their lives with the gender binary. Ponyboy basically says here that he rejects his body and the gender he was taught to perform from a young age.

C’est pour les hommes, mademoiselle. I walked past but he grabbed my arm and pointed to the door with a person in a dress. I jerked out of his grip as he called me...
-- Narrator (Ponyboy) (negative three)