Heard this on Writer's almanac on NPR:
http://almanac.mpr.org/docs/03_06_23.htm
Why I Take Good Care of my Macintosh
Because it broods under its hood like a perched falcon,
Because it jumps like a skittish horse
_ _ and sometimes throws me
Because it is poky when cold
Because plastic is a sad, strong material
_ _ that is charming to rodents
More at the above link. there is also audio.