I eat my wife's candy and don't tell her.
Why do you eat her candy without telling her?
Because she'll never give me any on her own.
You shouldn't steal from others, especially someone you are married to. Even if it is candy, it's not right and not telling them makes it worse.
I can steal from others if I like. I know it's good but I will replace them with others.
It's not so important in the scheme of things, but it's still wrong to steal from your spouse. If you want candy, you should buy some, and then both of you can happily eat your own candy.