In thermodynamics, non-ideal gas rule : P V = z n R T
By just considering only the relation of P (pressure) and V (volume), P is inverse proportion to V.
According to the equation, in other words, a satifaction of volume is necessary to relieve pressure.
So, when it is applied to human, generally to majority, it's understandable why one would gain weight when one gets too stress from works, studies, relationships and etc.
Because usually one would eat whatever till one thinks it's enough to relieve stress.
As a consequence, one gains weight, which means one's volume goes up.
Maybe you disagree. But Jane thinks and observes that it does apply to majority in the society. :)
Anyway, Jane wishes everyone has a very Happy Chinese New Year 2008 with a good new year ahead.
Be happy and optimism always is one of the good ways to destress as well. :)