Alton Brown, and if you get a chance to see the episode "There Will Be Oil" (Season 12, episode 5), watch it! He explains how different oils are processed - what it means if an oil is cold pressed, expeller pressed, or solvent extracted - and why the different oils are processed that way.
Here's the link for this specific section of the show on YouTube. If you want to see the whole episode, I know it's playing on the Food Network on Canada this week.
It's a great episode if you want to learn more about oils for cooking and for bath & body products!