some people prefer to believe that than to accept the fact that
effort is needed to maintain.
like some women I know, always say that others have much better
genes or must have gone for plastic surgery, while they themselves
dun exercise, eat like nobody's business, and end up fat like fuck
and jealous of those who are not. 
Reminds me of this crazy math teacher of mine, always slim and she
got her figure back like immediately after giving birth. people
assumed she has very good genes but fact is the madwoman ran 5km a
day 5 days a week!!!