And to be honest, up until Penguin US sent back my first edited book draft—completely covered in tiny little commas—I had no idea the Oxford comma was such a big deal.
Turns out it is ... and it isn't.
Because of that lesson learned, I am now a huge Oxford comma freak, gleefully adding them wherever the situation calls for them. But the truth is, as you'll see in this HANDY DANDY INFOGRAPHIC (thank you, Online Schools), they're really only a big deal in the U.S. And only in some circumstances. Check the map at the bottom of the picture.
I'm going to keep gleefully adding them, though. I like the way they clarify situations.
I would be happy to share with you the info about this, but, well, I already did! Yay! Here's the blog I wrote back in 2011 (trust me, nothing's changed). And *drum roll* here's the fabulous infographic. I wanted to just attach it here (so I did), but I couldn't make it any bigger, so here's another link to a larger version.
* I cannot believe what a nerd I am. The idea of an Oxford Comma infographic is just so exciting to me.