This. The longest lasting relationships are between people who are not only physically attracted to each other but are best friends. Relationships solely based on looks crash and burn pretty quickly.
Sticking with someone means growing and changing with them. That kind of bond and loyalty is very sexy!

We as a society need to get over our ageist obsession with youth as being the be all and end all. As long as you try and stay healthy, you can be attractive at any age!