Either that, or you're simply buying what Hollywood is offering. Naomi Watts is young and a big star, so she must be sexy, right? Do you prefer NW over Catherine Zeta-Jones or Jennifer Lopez, two megastars who have womanly bodies?
I guess I have been lucky all my life. I wasn't one of the prettiest girls in school, but at least I had good-sized breasts so I didn't have to listen to those mean girls who would tell the Plain Janes stuff like, "You must be a pirate's dream because you have a sunken chest" or "Are you president of the Itty Bitty Titty Committee?" I didn't have boys asking me if I was hiding fried eggs in my shirt or telling me to put some lotion on those mosquito bites.
At what point in history did a woman no longer need a good body to be hailed a sex symbol? I would think if you dudes had the chance to tickle one of Tom Cruise's women, you'd go for Rebecca DeMornay or Kelly MacGillis or Penelope Cruz over Nicole Kidman.