Warning-- this post is long and spoiler-laden.
One of the central themes of the movie. Washing-up takes on a symbolic meaning, too. The first time Vincent washes up, what’s he thinking about?
Vincent dries his hands on a towel while he continues his
dialogue with the mirror.
VINCENT
...it's a moral test of yourself,
whether or not you can maintain
loyalty. Because when people are
loyal to each other, that's very
meaningful.
Same goes for Butch:
ESMARELDA
No c'mon, you're him, I know you're
him, tell me you're him.
BUTCH
(drying himself with a
gym towel)
I'm him.
ESMARELDA
You killed the other boxing man.
BUTCH
He's dead?
ESMARELDA
The radio said he was dead.
He finished wiping himself down.
BUTCH
(to himself)
Sorry 'bout that, Floyd.
He tosses the towel out the window.
A little later:
BUTCH
(in a Mongoloid voice)
My name is Fabby! My name is
Fabby!
FABIAN
Shut up fuck head! I hate that
Mongoloid voice.
BUTCH
Okay, sorry, sorry, sorry, I take
it back! Can I have a towel
please, Miss Beautiful Tulip.
FABIAN
Oh I like that, I like being called
a tulip. Tulip is much better than
Mongoloid.
She finishes drying her hair and wraps the towel like a turban
on her head.
BUTCH
I didn't call you a Mongoloid, I
called you a retard, but I took it
back.
She hands him a towel.
Jules rises and dries his hands. Vincent takes his place at
the sink.
VINCENT
Just tell 'im not to be abusive.
He kinda freaked out back there
when he saw Marvin.
JULES
Put yourself in his position. It's
eight o'clock in the morning. He
just woke up, he wasn't prepared
for this shit. Don't forget who's
doin' who a favor.
Vincent finishes, then dries his hands on a white towel.
VINCENT
If the price of that favor is I
gotta take shit, he can stick his
favor straight up his ass.
When Vincent is finished drying his hands, the towel is
stained with red.
JULES
What the fuck did you just do to
his towel?
VINCENT
I was just dryin' my hands.
JULES
You're supposed to wash 'em first.
VINCENT
You watched me wash 'em.
JULES
I watched you get 'em wet.
VINCENT
I washed 'em. Blood's real hard to
get off. Maybe if he had some
Lava, I coulda done a better job.
JULES
I used the same soap you did and
when I dried my hands, the towel
didn't look like a fuckin' Maxie
pad.
The two men, trembling, scrub themselves.
THE WOLF
Don't be afraid of the soap, spread
it around.
The Wolf stops the hose, tossing it on the ground.
THE WOLF
Towel 'em.
Jimmie tosses them each a towel, which they rub furiously
across their bodies.
THE WOLF
You're dry enough, give 'em their
clothes.
JIMMIE
Okay fellas, in the one-size-fits-
all category, we got swim trunks,
one red -- one white. And two
extra-large tee-shirts. A UC Santa
Cruz shirt and an "I'm with Stupid"
shirt.
JULES
I get the "I'm with Stupid" shirt.
Think about the significance of the print on the t-shirts for a second. Got it? Sometimes baptisms “take”, and sometimes they’re just empty ritual.
Within the movie, every time someone is seen washing themselves, there’s an association with moral purity. Things turn out badly for folks who come out of the bathroom without washing first, too. The last time Vincent comes out of the bathroom, we hear him flush, and then he comes straight out-- no pause to wash first, and after a poop, too. The dirty bastid. Mia stands at the sink in the bathroom of Jack Rabbit Slim’s, but doesn’t wash, she does a big line, after which she significantly says, “I said Goddamn!” The script specifies that she is imitating Steppenwolf. (“Goddamn the pusher man…”) This may foreshadow the ill-fortune she’s going to have later. If so, she’s not washing, and it might be possible to interpret her words as a sign that she doesn’t take personal responsibility for her actions. The script specifies that during her OD, “Mia is on all fours trying to crawl to the bathroom.” Afterwards, like Jules and Vincent, she is given a clean T-shirt.
The one other character that we see in a bathroom who doesn’t wash is “The Fourth Man” (Yet another paratextual film reference, which has a sort of thematic integrety with Vincent’s “just having returned from Amsterdam,” and Mia’s assertion that she goes there once a year. Oh yeah, and the whole mystical vision thing.) After hearing Jule’s neo-biblical spiel, The Fourth Man makes the wrong decision, (violent aggression) and it doesn’t work out very well for him.
“Make it clean” comes up in other contexts, too:
When Lance is looking for his all-important “Black medical book” during MIA’s OD:
JODY
While you're lookin' for it, that
girl's gonna die on our carpet.
You're never gonna find it in all
this shit. For six months now,
I've been telling you to clean this
room --
And of course:
Jules DROPS his wallet in the bag. Using his gun as a
pointer, Pumpkin points to the briefcase.
PUMPKIN
What's in that?
JULES
My boss' dirty laundry.
PUMPKIN
You boss makes you do his laundry?
JULES
When he wants it clean.
PUMPKIN
Sounds like a shit job.
JULES
Funny, I've been thinkin' the same
thing.
I noticed Vincent’s inability to wash the blood off his hands first, it being the most obvious-- then, on repeated viewings, all the other incidents take on extra colours. I love this movie.