Xu Wenchang (1521-1593) was an eccentric artist I admired. He was harassed to offer a painting for an official's birthday. He really despised the corrupt official but obliged. At the birthday banquet, Wenchang's big peach painting in splashed ink was the centerpiece.
Folks were curious about what brush he used for the huge peach. Wenchang explained that he had a big well of ink prepared. He then disrobed himself and sat on the well. The peach was the imprint of his royal behind and that was his brush.
In order to paint its fruit, one learns peach blossoms first.