Oscar's voice is so realistic, in the hurt that is conveyed by Diaz's masterful use of images. He "shows" how nerdy and out of touch with the dating scene Oscar is in this scene:
What had hurt, however, was when Maritza dumped [Oscar]. Monday after he’d fed Olga to the dogs he arrived at the bus stop with his beloved Planet of the Apes lunch box only to discover beautiful Maritza holding hands with butt-ugly Nelson Pardo. Nelson Pardo who looked like Chaka from Land of the Lost! Nelson Pardo who was so stupid he thought the moon was a stain that God had forgotten to clean. (He’ll get to it soon, he assured his whole class.) Nelson Pardo who would become the neighborhood B&E expert before joining the Marines and losing eight toes in the First Gulf War. At first Oscar thought it a mistake; the sun was in his eyes, he’d not slept enough the night before. He stood next to them and admired his lunch box, how realistic and diabolical Dr. Zaius looked. But Maritza wouldn’t even smile at him! Pretended he wasn’t there. We should get married, she said to Nelson, and Nelson grinned moronically, turning up the street to look for the bus. Oscar had been too hurt to speak; he sat down on the curb and felt something overwhelming surge up from his chest, scared the shit out of him, and before he knew it he was crying; when his sister, Lola, walked over and asked him what was the matter he’d shaken his head. Look at the mariconcito, somebody snickered. Somebody else kicked his beloved lunch box and scratched it right across General Urko’s face. When he got on the bus, still crying, the driver, a famously reformed PCP addict, had said, Christ, don’t be a fucking baby.
It's so sarcastic ! The bus driver a reformed addict? ha ! ha ! This is diaz's way to show how absurd that a looser such as the bus driver would be disrespectful and hurtful to Oscar. But it just shows how unfair the world really is.
The book can also be interpreted as sexist.Lola blames her mother for what is not her fault. She says,
My mother would never win any awards, believe me. You could call her an absentee parent: if she wasn’t at work she was sleeping and when she was around it seemed all she did was scream and hit. As kids, me and Oscar were more scared of our mother than we were of the dark or el cuco.She would hit us anywhere, in front of anyone, always free with the chanclas and the correa, but now with her cancer there’s not much she can do anymore. The last time she tried to whale on me it was because of my hair, but instead of cringing or running I punched her hand. It was a reflex more than anything, but once it happened, I knew I couldn’t take it back, not ever, and so I just kept my fist clenched, waiting for whatever came next, for her to attack me with her teeth like she did to this one lady in the Pathmark. But she just stood there shaking, in her stupid wig and her stupid bata, with two large foam prostheses in her bra, the smell of burning wig all around us. I almost felt sorry for her. This is how you treat your mother? she cried.
And if I could have I would have broken the entire length of my life across her face, but instead I screamed back, And this is how you treat your daughter?
It's so pitiful, the young woman's view of her mother. It is so sexist because it is clear her mother is a victim. However it captures the mother-daughter relationship so well.