Why do teenage girls post naked pictures of themselves on the internet?
Low self esteem. They are looking for attention. Basically, teenage girls do this for validation of their looks because they do not feel pride in real life. It is especially troubling though, when even the most perverse comments become associated with a positive or okay experience in her mind. For this reason, this type of exhibition always backfires and does not actually raise her self worth.
Wow I thought I had been posting some long answers to questions. There’s a variety of plausible answers that could be used for your question but I personally think that it comes down to poor parenting and society sexualizing girls at far too young of an age. There are 12 year old kids having unprotected sex when they are nowhere near responsible enough to care for a child that could result from it. Girls not everybody needs to or wants to see you naked and you should try to keep the number of guys you sleep with as low as reasonably possible. Most parents right now are very nearly worthless. Wait a decade or so and then you’ll see when things really go all to hell.