Yves klein's anthropométries de l'époque bleue, march 9, 1960, used "living brushes" in its creation. these brushes were actually:

Yves Klein's anthropometries de l'epoque bleue, March 9, 1960, used "living brushes" in its creation. These brushes were actually woman's body's dipped in paint. The woman then made the body print on a clean white canvases, that became a painting showing female like outline on the canvas. This made the painting quite unique from the traditional ones whereby the painting brush was majorly used to create the paintings. 

If you make it more clear i can answer it