I could contentedly listen to an alto or bari sax for hours on end when in the hands of an exceptionally talented musician... *sigh*
Which musical instrument does it for you?

The double bass does it for me when it comes to sexy. I also used to have a huge crush on a guy who was playing it when I was in highschool.

A babe on the bass ...or a lady playing cello
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"The tighter you grasp Lord Vader, the more it will slip through your fingers."

A filly on the fiddle.
Failing that, some Stephane Grappelli, Nigel Kennedy, or even Andre Rieu.
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Give me golf clubs, fresh air and a beautiful partner, and you can keep the clubs and the fresh air.
(Jack Benny)

A coin belt on a belly dancer.

What a beautiful sound!

Hmmm to listen too, I'd probably go for a didgeridoo or some other deep earthy bass sound BUT there's nothing as sexy as a guy with guitar fingering!!
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http://arisingmoon.deviantart.com/gallery/#-Fantasy-Art-
http://myriad28.spaces.live.com/

For me it's a guy playing the drums. Very sexy indeed!
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I'm a humble person...I'm really much greater than I think I am!

Spanish/Classical guitar and Bass Guitar! Jizz.

Whatever Alison Hannigan played 'that one time, at band camp'
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Shirley the sexiest musical instrument is the human voice?
A woman's - mid-orgasm - is pretty sexy.
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Give me golf clubs, fresh air and a beautiful partner, and you can keep the clubs and the fresh air.
(Jack Benny)

Percy Edwards larynx was like leather apparently... so, anyone with a leather fetish...?!

my sexist musical intrument is the Flying V...end of. but this would be the ulitmate one... Flying V in black with flames reaching from the bottom right up the headstock and in the hands of randy rhoads.....instant excitment for that V.
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Vice Admiral Sarah of the USS Apllo
Vice Admiral T'Pau of the USS Princess
Vice Admiral Sileg of the USS Retribution
Lieutenant General Tries of the IKS Hek'ihr
Lieutenant General Vukno of the IKS Gortoth
HMD (thanks to Justmet)