what (someone) eats doesn't make (one) fat(redirected from what she eats doesn't make them fat)
what (someone) eats doesn't make (one) fat
The preferences or needs of someone else has no bearing on one's own life, so there is no point being judgmental of or bothered by them. A: "I was thinking of joining the circus. What do you think?" B: "It wouldn't be the way I would want to live my life, but what you eat doesn't make me fat, so I won't judge."