Dark Aura protects from physical harm. Slippery lube doesn't harm them.Not sure why the slime gets through the dark aura, but probably best not to think about it.
I rechecked the first chapter, seems like it "greatly dulls external stimuli and sensations". I had miss-remembered it as just blocking out everythingDark Aura protects from physical harm. Slippery lube doesn't harm them.
Nice view ASS in here
Switching to a bidet would probably solve thatMy ass is tingling