I've seen some unbelievable and extremely disgusting examples of this from back in HS. Most of the guys just look like older versions of themselves but easily recognized even 10+ years later. The slender, petite gymnast every boy fawned over at 12 and every man turned their head at by the end of HS gained at least 200 pounds and she's not the only one, not even the most extreme. That's the problem with the whole "it's only 20 pounds" argument. Sure, 20 pounds on a sufficiently thin girl might not be an immediate emergency but the problem here is the time span. 30 pounds over a 30 year marriage is one thing, 20 pounds a year is going to turn into a planetary issue pretty quickly.