Originally Posted by Browncoat

I think a lot of what's sexy about a woman is what's going through the guy's mind (as they say: beauty is in the eye of the beholder).

Clothing can be sexy, but a woman can be wearing completely ordinary clothing and be sexy.

Jewelry can be sexy, but my wife rarely wears any and I find her sexy.

Perfume can be sexy, but isn't required.

Sexiness can be just in a look or in the way she moves (even if just for a moment and it wasn't intentionally sexy).

I think for the most part sexiness for a man comes from wanting something and not quite getting it (teasing in all it's forms). Whether it's something you want to see but can't yet (lingerie is built around this), some part of her you want to touch but can't just now (even if it's just that you want to kiss her lips but can't atm), something you want to do with her but just can't yet, etc...