Personal opinion...those who marry strictly for looks or money, earn whatever they get.
Maybe they should just take this part out of the marriage vows:
"..For better or for worse, for richer or for poorer, in sickness and in health, 'til death do you part.." since a lot of folks just don't seem to take that seriously anymore and just want to bail at the first sign of trouble or something that they don't like about the other person (like, God forbid, gaining a few pounds).
My DH is a lot heavier (probably 50 pounds or so) than when I married him 18 years ago. While I would like to see him drop some of that weight, it's out of concern for his health since he has a strong family history of diabetes and heart disease and he's a strong candidate for both with where he carries his weight (primarly in his abdomen). If he doesn't, well...I'm not about to kick him to the curb. I didn't marry him because he was thin, I married him because he's a great guy. Looks don't last forever. Personality does.