Sleeping on the Wing by Frank O’Hara   When we take into consideration the concept of the volta in relation to Frank O’Hara’s poetry, it’s tempting to suggest that the briefest enunciation of his aesthetics reveals him to be primarily a poet of the turn.  After all, he called the poems that would comprise what is arguably his most famous single volume, Lunch Poems, his “I do this, I do that” poems, a witty tag that suggests at once the battery of that work and the insouciant—though precise—delight he took in it.  The shift from “this” to “that” is, at base, a turn from one action to another. As we all know, those poems have remained in the poetic consciousness of those who demand…