I became very obsessed with death, and the idea that you never know when death will arrive, so one has to do as much as possible all the time to get the most out of life. That would be a motivating force. And death was a big part of my life growing up. I went to lots of funerals ... But you digress. [laughs]
http://www.interviewmagazine.com/music/madonna-1/#page3