As little as I try to think about it, I do step onto the bathroom scale from time to time. Healthy lifestyle changes notwithstanding, I've been hovering at about the same weight since November 2011. At the same time, my waist size has decreased by about four inches.
This means, basically, that my mass / weight are the same, but my volume is decreasing.
I figure at this rate, by about the year 2313, I may collapse into a black hole.