one man's meat is another man's poison

[one man's meat is another man's poison] What is good for oneperson is not necessarily good for another. - A proverb,

Eventhough Jeff likes to swim in ice cold water, his brother Tun hates it.This is understandable, however, because one's man's meat is anotherman's poison.

Contrast: WHAT'S SAUCE FOR THE GOOSE IS SAUCE FOR THEGANDER.