Nude Descending a Staircase

A poem by X.J. Kennedy, about the Duchamp painting of the same name…

Toe upon toe, a snowing flesh,
A gold of lemon, root and rind,
She sifts in sunlight down the stairs
With nothing on. Nor on her mind.
We spy beneath the banister
A constant thresh of thigh on thigh.
Her lips imprint the swinging air
That parts to let her [...]