

During the Punk Hazard arc, Trafalgar Law swaps Sanji into Nami's body and
Smoker into Tashigi's. In spite of them being in bodies not addicted to
nicotine, it seems they both still need to smoke. Nami (in Franky's body) even
offers Sanji a pack of cigarettes saying something to the effect, "You need
them, right?"

When Trafalgar Law swaps everyone, the image shown is some weird heart thing,
not swapping their brains. I assume this is some kind of representation of a
soul, but if they still need nicotine, maybe I'm wrong. So, what exactly does
Law swap? And why do Sanji and Smoker still need to smoke?


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one-piece
Why do Sanji and Smoker still need nicotine when not in their own bodies?


If you ask any smoker, he will tell you that most of the addiction comes from
the brain as it gives the neuro-signals for pleasure when smoking. Most
smokers can't quit not because the body demands nicotine, but because of the
apparent relaxating effect that is produced by smoking and the habbit that
results from it.

Smoking is a recreational drug in public view and tends to work as such.

Edit: And now on how Law's power work. The swap technique that Law uses looks
like he is swaping the "hearts" of people, but because they retain their
original thoughts, memories and even habbits (like smoking) makes me believe
that it's actually their consciousness that is being transfered since all
these reside in the brain and not the heart.

Hope this answers your question.


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Simple Answer: Law's DF is wired (even kadio annoyed by that), and even a
mystery to that point.

It was stated, one of the most usable, power devil fruit in the world.

So, How law can change someone's mind(brain) to another person by swiping
their hearts! It ven does seems, it's only the conscious state. And sub part
reamins in the brain of that body. (ref: Franky in Chopper's body)

A Heart never can have a mind!

This is a unanswered mystery yet. We've to wait until the real information.
Until, you can check some fan theories, analysis on that. Maybe will help to
understand better.


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2021-04-14T22:53:33.273
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I don't think this question can be fully answered, so I'll just list out some
possibilities, as well as some evidence for and against.

**First Possibility** : Law actually swapped not only their brains, but a lot
of their internals as well. Sanji in Nami's body claims to be the best swimmer
on the crew and thus he has to be the one to rescue the samurai's torso from
the sea. But why does Sanji still have his abilities while in Nami's body? It
might make sense if Law swapped the internals of the bodies, including
muscles.

Where this theory seems to fail: Franky and Chopper's bodies seem to work as
normal. Also, when Sanji and Nami swap back, Sanji feels the pain his body
went through under Nami after she punches him, saying "My body hurts from a
whole lot more than one punch." If the injuries were only skin deep, he likely
wouldn't collapse from the pain here.

**Second Possibility** : Law actually did swap their souls. And somehow, in
the world of _One Piece_ , skills and memory are stored in the soul, thus why
Sanji still has fighting potential while in Nami's body. And maybe the soul
really is stored in the physical heart (Who's to say in a fictional world?
Whether it was the actual heart is not important, however, and as previously
stated, the physical representation of the swap did not look like a real
heart.). And what else is stored in the soul? The urge to smoke, apparently.

Where this theory is weak: If the characters still have access to the actual
brain of the body they're in, and thus the memories and knowledge, this would
be odd, as they don't appear to have much idea of how to use their abilities.
Nami in Franky's body seems particularly inept.

**Third Possibility** : Law swapped their brains. It is very plausible that
the urge to smoke would carry over, then, along with all their memories.
Though as to why Sanji retains some physical prowess, there would seem to be
no good answer.

The second and third possibilities likely are more credible, as Sanji does
struggle a bit in Nami's body, saying at times he can't keep up,etc. But at
the same time, he's clearly got too much physical prowess while in Nami's
body, so something is definitely off. It could possibly be a combination of
the second and third as well.


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