S.H.
When I was kid, in middle school, 7th grade and up... some kids had "girlfriends" or "boyfriends." Who knows if they actually told their parents.
And, while out or even after school, they'd go behind buildings and make out and grope each other. Other kids, knew this.
At this age, sometimes friends/buddies, girls and boys, go out and hang out, go to the movies or what not. Well, these kids, after the parents would drop them off...would then separate from their group of friends, and couple up and go somewhere inconspicuous and make out. And no, they didn't tell their parents this.
These were kids, who were otherwise regarded as normal good kids. It was not only the "bad" kids that did this.
It was not lots of kids that did this... but some did. And the other kids knew this, and/or saw it.
So keep this in mind.
At this age, they don't even know what a boyfriend or girlfriend is.
And they don't even know about their bodies but are finding out.