GR translation: which is getting pretty intimate.

[Mike Jing]

V688.10-14, P701.31-35   Shit, now, is the color white folks are afraid of.
Shit is the presence of death, not some abstract-arty character with a
scythe but the stiff and rotting corpse itself inside the whiteman’s warm
and private own asshole, which is getting pretty intimate. That’s what that
white toilet’s for.

What does the relative pronoun "which" refer to here?