It's not really so much the ribbion that causes the problems,
but it's the rings.
http://www.bmezine.com/news/pubring/20050417.html
Yes, these piercings will look nice for a little while, but
not long afterwards they will start to get irritated, reject, and
the women will be left not with a pretty set of rings, but with two
rows of scars running up their backs where the piercings once were.
Depending on their skin type and how long the piercings were kept,
these scars may be highly visible, noticeably uneven, and can stay
with them for life as much as they may come with good memories,
they are likely not the result hoped for when the wearer first saw
the piercings and thought how pretty they looked.