Simile or Something More?

"' Look how he knows how to use his horns,' I said. "He's got a left and a right just like a boxer.'" (p.144)

This is an example a simile. The comparison ist that of a a bull to a boxer. I also feel that it indirectly foreshadows Cohn's attacking of Jake later on in the novel. Jake is like the steer who attempts to deflect the blows of Cohn to "the walls" (his friends) and takes off the blows himself. In the end Cohn knocks him down, and he suffers. However, Jake, like the steer gets back up again, but never fully rejoins his friends. In this way, the simile also becomes and extended foreshadowing metaphor. Though, I do wonder what other ways there are to interpret this simile. Perhaps, there are no true meanings beyond the metaphor itself.