This is just complete speculation, but to me, the timing and difference in ratio between male and female seems to correlate extremely well with a hypothesis tha

This is just complete speculation, but to me, the timing and difference in ratio between male and female seems to correlate extremely well with a hypothesis that much of this is driven by the "sexting age" brought about with the advent of snapchat and similar apps. These apps have the dangerous duality that they are viewed very naively by less tech literate who see as something that facilitates sending nude pictures by only letting your recipient see them and deleting them after a fixed period. Of cause to anyone slightly more tech literate apps like that are a bombshell waiting to happen anytime anything remotely compromising is sent. This fits well with a lot of the cases you hear about where what would have just been hallway gossip of "did you hear that XX and XY broke up and are fighting?" which now is a viral package of pictures typically of XX being sent around to everyone on campus. This hypothesis also helps to explain why European countries where snapchat and similar apps never gained huge popularity before there where already campaigns warning young people never to trust that something sent through them would not end up on the internet forever. But that's all just random speculation on my part, and I have no real evidence to make the connection. All I can say is that the timing and ratio makes me thing that it's worth looking into just how many major depressed teenagers have had some sort of personal material leak outside of the intended recipients.