Like 95% of Tarentino movies use the juxtaposition of a bunch of crazy ass holes, discussing fukked up scenarios, the way sane people discuss everyday things.
You got this jackass who went from discussing how great his coffee taste is into how it's annoying to bring a dead guy into his garage because it'd be annoying if his wife saw it.
Remember, a lot of his characters aren't typically likable people even though they have likable traits.
I met the dude, twice, (Once I was drunk and he gave me water ) and I think he's just a weirdo. He's nice, chill, and everything...but he just sees things in an off way.