Satirical hyperbole. I apologise it didn’t meet your requirements however this doesn’t seem in align with the consensus so I’ll take the comment lightly I’m afraid.
That being said, it is not unheard of individuals having children in this demographic. It is also in my dialect to call males younger than I ‘son’ also so potentially I never meant offspring of my own but rather a younger acquittance. You also ruled out the fact anybody can access these subs regardless of whether they belong or not. Anyone of any age can access r/teenagers such as parents and anybody of any age may visit r/6thform as even 50 year olds can sit the A-level exams.