Fatties get mad when you tell them that medication doesn't magically make them gain weight

my eating habits didn't change

Activity must have changed then. It's one of the other you fat frick and over time it adds up.

Being fat correlates with being stupid. This is a fact. And stupid people can't comprehend that a very minor change in habit over time -- for example changing from a job you walk to to a job you drive to, or a job in retail to a job in an office -- can cause your long-established eating habits to make you fat if you don't account for the change.

It is so staggeringly simple. Just eat less.