concern about the colourful and precious items women may remove from their ear, their mouth, and share in the public space.
& the concern about the intimacy of women in the private space.
(debate if women wearing gold teeth or coloured strings in pierced ears in public is if these items are things that are beautiful, and they may be tempted to remove and show each other. later on the page is ruling about girls not sharing a bed, as "women who rub" might be considered 'zona' and not eligible to marry into the priesthood. there is another opinion that girls should not share a bed, is just so they shouldn't get used to sleeping with another person present. for english translation of this talmud page, see here)