On a recent episode of "Wait, Wait, don't tell me" on NPR, the story went
out that the Scottish Regiment in Iraq was suffering an equipment
shortage, too: they had only 300 dress kilts for the entire regiment, thus
making it impossible for them to dress properly for parades.

At that point, one of the panelists muttered,

"why do Scottish shepherds wear kilts?
Because zippers startle the sheep".