fanning yourself - can it be effective?

On a hot day, you see people fan themselves to cool off,
with a magazine for instance.

I watched someone doing that yesterday, and said
"That's an illusion, it can't really cool you, that would
be a violation of the 2nd law of thermodynamics.
Actually, you're generating more heat through muscle action."

My friend answered that it can work, through convection.
We argued for a bit, to no conclusion.

Who's right?


--
Rich

.

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