FWIW, if you want to know whether you gained weight, go to China. People will frequently tell you how much you have gained or lost since they last saw you.
EDIT to add: and the funny thing is, Chinese are very concerned about face and honour, and will lie to protect it. It's just that weight is merely an aspect of your body and health to monitor, not something sacred or potentially shameful.
EDIT to add: and the funny thing is, Chinese are very concerned about face and honour, and will lie to protect it. It's just that weight is merely an aspect of your body and health to monitor, not something sacred or potentially shameful.