ledkr. Does your DD see you naked? Other non teen females? I know I did at her age, so other than tidying up the edges 'doing something' wouldn't have occured to me. In a very non arsey way, I'd be interested in knowing why you feel it's sad she asked and why you posted in this section. Do you think she is being out under pressure to do it and if where from?
In other arguments... I prefer it all waxed off, to me it feels nicer & yes, it feels cleaner to me, especially when I have my period, but at other times too. I always shower once a day, usually twice. I also prefer the feeling when having sex, it's more sensitive. The first time I did it was to see if it felt as nice as when you've had your legs waxed and it did, nothing to do with porn whatsoever. I don't wax anything now though as it's too expensive where I live and I can't inflict that much pain on myself 
Insisting it's just a porn thing or non feminist thinking, is really narrow minded.