Because mine doesn't. Ever. I've put on weight since menopause.
About 10 years ago a friend of mine thought I was flirting with her dh (I wasn't, friend is an alcoholic and was drunk) and sent me a really horrible text saying I was a frumpy country housewife. I've never really got over it.
My self confidence is zilch, even though I get ny hair done, wear nice clothes and do my eyebrows/wear make up etc.
Just feeling sorry for myself!