Okay, so I know this is a point of contention for many a writer and editor: you are either for or against the Oxford, or serial, comma. I make no bones about it: I am definitely an Oxford comma girl. Can’t help myself. It just makes sense to use it. And, to further make the point, I cut my teeth in an industry as an editor where the Oxford comma was king. Please see the Chicago Manual of Style if you need proof.