who let themselves be fucked in the ass by saintly motorcyclists, and screamed with joy, who blew and were blown by those human seraphim, the sailors, caresses of Atlantic and Caribbean love, who balled in the morning in the evenings in rosegardens and the grass of public parks and cemeteries scattering their semen freely to whomever come who may, who hiccuped endlessly trying to giggle but wound up with a sob behind a partition in a Turkish Bath when the blond & naked angel came to pierce them with a sword, who lost their loveboys to the three old shrews of fate the one eyed shrew of the heterosexual dollar the one eyed shrew that winks out of the womb and the one eyed shrew that does nothing but sit on her ass and snip the intellectual golden threads of the craftsman’s loom, who copulated ecstatic and insatiate and fell off the bed, and continued along the floor and down the hall and ended fainting on the wall with a vision of ultimate cunt and come eluding the last gyzym of consciousness,
Just a wild guess, but I feel like there wasn't much of this kind of writing in the poetry sector before this poem. We haven't read anything with blatant sexual references yet from this period.

This painting by Aaron Douglas speaks to the African rivers that Hughes mentions-- there is a river in the center of all of the movement. It acts as a background to the multiple scenes taking place in the foreground layers.
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