Alex spends 1/2 the movie abusing those weaker than himself. His sexual pleasure is an extension of his lust for ultra-violent behavior. The second 1/2 he becomes the weak character being betrayed, beaten and used by all his former
victims, family and "friends." I can't say for sure, but didn't he finally "see in his vision" sex as a glorious thing, rather than a form of violence when he ...