Scarlett,

I hate to burst the bubble about the young girls that cover, but...

According to most of my Qatari male friends, many of the younger Qataris who chose to cover do so in order to conceal their identity in public in case they run into guys who they have previously 'known' (biblically speaking).

It's especially common for new wives to begin covering their face to avoid embarrassing their husband when she gets knowing looks from men who have seen her hair (not the stuff on her head).