It seems to stem from the whole "A good sermon is like a skirt: long enough to c...

jokermatt999 on Aug 17, 2010 | parent | context | favorite | on: Wired's bullshit "The web is dead" graph

It seems to stem from the whole "A good sermon is like a skirt: long enough to cover the essentials, but short enough to maintain interest" (paraphrased). Not the same meaning, but it appears that the phrasing came from there.