Fun with frottage

Ladies, a definition and example of frottage is given on the cover of your new sketchbooks.

Try it this week; see what you make. Don't look in the house. Rub the outdoors. Streets, signs and textures. Don't scribble over the face of old farmer Chang though; his life is hard enough.

For examples and ideas, try All About Drawings.

And if you want to think about it... Wiki says Max Ernst 'invented a graphic art technique called frottage'. I think Ernst brought the approach into the range of drawing techniques used by graphic artists, and so encouraged its acceptability, but inventing is a bit strong. What do you think? Is frottage an approach to mark making and communication that you can imagine people doing for generations?