Mostly when I write I write first and draw later. But when I do sales graph cartoons it\u2019s often backwards. Take this cartoon, for example. I drew this graph and that arrow going back over the axis and pondered it for a while. Then my wife looked over my shoulder and said \u201cwhat\u2019s going on there?\u201d And I responded \u201chonestly, I have no idea.\u201d And then I had a new graph cartoon.