A couple of thoughts on this:
When I visited BYU last year with a group of Trinity students, several of them remarked at how "pretty" the women on campus were. I remember having the same impression myself as a 17 year-old visiting Temple Square for the first time (although I thought that both the women and the younger men looked better than average). We aren't alone in this observation. Frank Abagnale Jr. of
Catch Me If You Can fame wrote about how gorgeous the women at BYU were in his book---how that had inspired him to fake his way into teaching introductory sociology classes at BYU for a spring term and a summer term. This was a man who'd had hook-ups with women all over the world, and he thought that the women in Utah (and BYU in particular) were some of the "loveliest" he'd seen.
Assuming these observations are more or less accurate, I've long thought that the superior physical appearance of these Mormon women is probably related to the LDS emphasis on the need to marry and have children ASAP. It seemed to me like the women were simply putting more time and attention into their appearances than the average women: more time spent on doing cute things with their hair, make-up, nice outfits, etc.
Is it so much of a stretch to think women might feel pressured to continue to look their best as the years wear on? That they might turn to plastic surgery to facilitate that? Especially if having a lot of children has tugged their bodies out of shape.
I don't believe that the LDS church will or should try to come up with a policy on cosmetic surgery for the same reason that the church will not try to crack down on the overweight for being Word of Wisdom breakers: because it's difficult to determine who is really breaking the rules and who has a reasonable health concern. Some people do have misshapen, unusual facial features, or pockets of fat that won't disappear no matter how much weight they lose, or they may have had a mastectomy to fight breast cancer. Do we really want to see the church make some attempt to sort the needy from the vain?
Tangential Sidenote:
This is a site that I sometimes recommend to engaged or newlywed Christians and Mormons. The site offers a relatively clean discussion of sex and sexual problems from a Christian perspective and generally does a good job of discussing various methods of birth control without being judgmental. I was kind of surprised to find that the site had an article on
Brava Breast Enlargement.