What are the motifs in Vernon God Little by D.B.C. Pierre?

Sex pervades Vernon God Little but only once is shown taking place, when Taylor Figueroa seduces Vernon to obtain a confession to murder. By then it has grown clear Vernon's experience with sex is typically adolescent. He and his friends learn about girls, guns, and beer in isolated Keeter's field, and are simultaneously turned on and off by Ella Bouchard, a simple-minded, underdeveloped classmate willing to show her north and south "poles" to the boys. Vernon uses his mother's lingerie catalogs to masturbate, and appears to have an underwear fixation as he rides his bike through town. H