Eyes indeed for me-all the other “physical” stuff doesn’t matter, by way of comparison; for starters, gotta have a bright light shining from those orbs (THEN I’ll get off on her other bits).
Other: All of the above.
Of course, you left out sense of humor. And warmth. And cute little bunny rabbitness.
But yeah, boobies.
Boobies are very important obviously but above them for me are the bum, hips, legs, stomach… Curves, basically. If I’m caught in just the right mood I can get turned on by a frickin’ sine wave.
I’m an ass man.
Probably because I’m an asshole as well. 
I put buttocks, but if it had been an option I’d have picked hips.
I went with butt. More specifically, it’s the butt-waist-hip shape and ratios.
Granted I’m really not the person to ask, but a woman’s brain does it for me: it controls what she says, the way she moves…
Feet.
I first notice the face, but since the question was “most erotic,” gotta go with the boobies. Good hair, hips and tushy are definitely pluses, too.
I think this should explain things.
Fool of a Took! You forgot waist/hips. Specifically the part where it bends in from the torso to the waist and then flares back out… I’ll be in my bunk.
Her mind.
Not even close
http://www.flickr.com/photos/26870187@N02/4604441924/
and low standards are nice
Exactly. Mmmmmmmm…
FTFY
Boobies. Boobies boobies boobies. Boobies!
“My dear, you have a lovely eucipital mapillary.”
“I love her mind. After all, it was her mind that told her to get in bed naked with me.” - Stephen Wright
Face by miles. I’d guess about 90% of my physical attraction to a woman is her face.
It could never be any one, singular body part for any given woman. The whole is greater than the sum of the parts, or something.