It's funny how there is such a sudden epidemic of this in the past years. It used to be priests, now it's teachers. Though with teachers more than half the time it's with the student's consent as it's typically older kids. If there is consent (and not coaxing) I see nothing wrong from a legal standpoint. Sex before marriage is wrong but that's another story.
I'm going with "information bias" on this one, in that we're simply hearing about it more - and the "news" outlets know that, so they'll try to capitalize on it as much as they can.
Sex has been a big deal for our species for a
very long time. This type of behavior is nothing new.
Information bias is interesting.
A semi-related example: Penguins. I'd always known that the way they'd come out of the water was to launch themselves out of the water, and then land feet-down on the ice. That's how they're often shown in US-made documentaries.
Or animals doing crazy acrobatics and never messing up. A lot of those shows are evidently edited to show only the "good" takes.
Watching some British-made documentaries, and they show that the penguins
don't get it right all the time. They show them launching out of the water and landing face-first, feet-first, doing belly-flops, or bouncing right back into the water.
Or a fishing bird skimming the surface of a lake and then "tripping" when a wing hit the water, causing it to fall right in.
Or a monkey trying to jump to another branch, missing, and flopping into the stream below.
The stages of filtration and editing can really skew the information you get to see, and with media giants growing larger and more concentrated, the information distributed is edited by fewer and fewer people, allowing their own biases and preferences to influence a larger audience.
(I'll also add that the British-made documentaries are
so much better than US-made stuff. A US-made documentary on sharks had a gruff narrator that sounded like he was straining to push a shark from his intestines, and they're all so over-dramatized. They'd try to add drama or tension to dandelion seeds: "How many will survive cold winter and predators???" Give it a rest.)