Theres a massive difference between giving age appropriate information, and promoting adults sexual practices (and fetishes) to underage dc.
That comes under the bracket of an oversharing pornographer.
The pp who said they tried anal because they heard.
You see thats what teens, underage, do.
They hear and do.
So, that advice advocating playing with their shit?
Would you try that? What fun we're all missing. All this time dumping our shit in a loo, when we could have been playing with our toxic waste.
I am so sheltered, frigid, prudish aren't I, because thats not somewhere I'll go. 
If consenting adults want to indulge their shit fetishes go ahead, on your own, or with fully consenting other shit player, but to tell underage kids about this as a thing? Its a fetish!!
Dont we want our dc to have healthy sexual relationships and not sink into grotesque fetishes.
Underage sex is illegal for a reason, to protect dc.
Some will always be inappropriate, sometimes through having to try ill-advised things for themselves, others, do wait until they emotionally mature enough.
Women and girls get enough mysogynistic messages about their role in sex being focussdd on male.orgasm, often not knowing how their own orgasm works, but more familiar with how to induce male orgasm.
Are girls learning about female orgasm.
I've heard women being upset and not knowing what's happening to them when they experience strong vaginal pulses. Older women who should know and have played servant to a mans perverse needs all their life.
Age appropriate.
What's being promoted here is illegal, and perverse, fetishistic.