I have two older teenage boys so have very little experience of teen girls (none in family, for example).
Yesterday my 16 year old was scrolling through his instagram from my laptop in the kitchen (phone was charging upstairs) and left it logged in. When I came to use it I noticed a post from the 15 year old daughter of some friends of ours who are currently on holiday. She was topless, but turned to one side so you couldn't see her nipples and was wearing a thong bikini exposing virtually all her bum and was sitting astride a chair in a fairly provocative way.
OK, I'll admit it, I was a bit shocked, so I was nosey and looked at this, and some other of her posts. It had over 400 likes and when I looked at her profile she has nearly 1000 followers. Some of the comments were clearly not from schoolfriends but were from companies and agencies etc. Some were a bit 
but lots were about 'nice peaches' etc and requests to DM etc.
I had a quick scroll and it seems as if nearly all the teenage girls are doing this while they're on holiday - scantily clad, posing like porn stars, pouting, wide legs, licking things and they all seemed to have many, many more followers than they must know people in real life.
Is this really how it is? I can't believe my friends know about this and would be happy about it. Just a few weeks ago they were telling us that she's quite young for her age and not really into boys yet
Is this really what teen girls are doing these days? Do you monitor or have any idea what your daughter posts? Would you want to know about this sort of stuff?