The sexiest non-sexual part of a person's body...

The mind.

 

A woman's back can be a very pleasurable thing to view, especially if topless.

 

A woman's mouth, lips, eyes and legs.

 

Every part of a woman can be sexual, just depends on how you use it.

To answer the question though, I'd say the small of her back and that area just below the jaw line on the side of her neck, that I love to kiss.

 

i get stuck looking at a ladies hip/stomach area.... like when low jeans n panty string pulled up high was the thing, i was in heaven... even when playing in bed or where ever i find myself kissing n biting their side n hip

 

Same here... To be honest every non sexual part of a woman turns me on. Except maybe arm pits and toes... Although I know that's quite the thing these days.

 

A nice muscular back..