[いいだしっぺ, iidashippe] (exp) the one who brought it up; the one who calls attention to a fart is in fact the farter; the one who brings up a subject must be the first to act upon it
[へをひってしりつぼめ, hewohitteshiritsubome] (exp) there's no point squeezing your buttocks after you have farted; no use shutting the stable door after the horse has bolted