The story goes that Picasso was sitting in a Paris café when an admirer approached and asked if he would do a quick sketch on a paper napkin. Picasso politely agreed, swiftly executed the work, and handed back the napkin — but not before asking for a rather significant amount of money. The admirer was shocked: “How can you ask for so much? It took you a minute to draw this!” “No”, Picasso replied, “It took me 40 years”
Special thanks to Brian Braun for showing me this.