There was just a study verifying that phenomena, Mr. S. Twins who weighed more, looked younger, particularly in the area of wrinkles.
One of the negatives of maintaining a lower weight has been the prominence of laugh lines. Both my mom and dad had (have for my dad) them. And they both maintained a healthy weight into older age. My dad is almost 84 and pretty trim. Yet, he does no exercise. I always thought my mom's laugh lines were from too much sun, after years on the Cape and living in FL and AZ. But, they got worse as she became thinner.
Still, I don't want to gain weight to get rid of the wrinkles!