Yiddish: Therefore the geese go barefoot and the ducks wear little red shoes.

A mocking response to a non sequitur, or a nonsensical explanation of something that doesn't need explaining.  SOURCE: Bernstein, Jüdische Sprichwörter und Redensarten.  Variation:

.דעריבער גייען קאַטשקעס באָרוועס און גענדז אָן פּלודערן
Deriber geyen katshkes borves un gendz on pludern.
Therefore ducks go barefoot and geese don't wear trousers.

SOURCE: Stutchkoff, Der Oytser fun der Yidisher Shprakh

דעריבער גייען די גענדז באָרוועס און די קאַטשקעס אין רויטע שיכעלעך.

Deriber geyen di gendz borves un di katshkes in royte shikhelekh.

Therefore the geese go barefoot and the ducks wear little red shoes.