Michelangelo's hidden side

According to the book Michelangelo: A life on Paper, the Italian Renaissance painter scribbled jokes, thoughts , shoping lists in the margins of his artistic sketches. Apart from the famous works, he also left behind 600 cartoons and drawings. They also include poems, memos to his assistants, explanatory  notes to some of his great works, achingly personal expressions of ambition and despair.   He wrote around 300 poems in his lifetime.
A true Renaissance man!