Post-marriage Ponderings

Been really busy these past few months - getting married !! Well the marriage ceremonies hardly took about 6 hours, but the preparations took about 6 months (seriously!). Anyways this is not about marriage or about me, but about post-marriage and my wonderful wife. For some weird reason everyone she meets post-marriage (its about a month now) seems to be asking her why is she still the same and why hasn't she put on more weight !! Now the whole logic of this perplexes me. In the first place, why is she expected to put on weight? Is it that a newly married wife is supposed to have a more relaxed and less strenuous life now that she has someone else to do the running about? (no sorry that's not gonna happen sweetie :) ). Or is it because you have now 'settled down', so you tend to accumulate umm 'mass' ? Or that the huge amount of endorphins coursing through your blood at around this time has some side effect? I mean I just don't get it !! Is there some physical, chemical or social reason for such a phenomenon to be expected ? And what is weirder still is - why aren't they asking me the same question?!! (on second thoughts, it's good that they don't ;)