I'll tell you why we they do it. It's because your hair turns to shit after the menopause. It gets thinner, and ceases to be the shiney, heavy silk of youth, but rather the uncontrollable candy floss of old age.
Also there is no hairstyle that is magically going to make us look 35 again, and mostly we're not going out on the pull, so we can please our bloody selves with something easy to look after for once in our lives.