GR translation: home to your sprung, spermy bed

[Mike Jing]

V51.22-26, P52.18-23   A thousand children are shuffling out these doors
tonight, but only rare nights will even one come in, home to your sprung,
spermy bed, the wind over the gasworks, closer smells of mold on wet coffee
grounds, cat shit, pale sweaters with the pits heaped in a corner, in some
accidental gesture, slink or embrace.

What does "sprung" mean here?