This crap is totally unfair. Why is it that I can recall plenty of people throughout my life who have been naturally thin, ate like pigs, and never did any more exercise than me. I remember a friend in 5th grade who was not involved in any sports and didn't have a particularly active family so I would assume wasn't all that active outside of school either.....and she was at my house and ate like a whole bag of dill pickle chips. (And no - she didn't throw it up afterwards!)
Me? I could look at a single potato chip and probably gain a pound. Sure, lately it hasn't been as bad but that is only because I kick my own butt exercising including strength exercises, and have probably raised my metabolism that way. But I ain't no Lady Gaga....I sure wasn't born this way.
Just a random vent brought on by a random one day gain (most likely of water weight after eating some delicious fries last night).