My 15 year old daughter is going to a sleepover tomorrow night....

I'd say no mixed gender sleep overs and not let her go.

I'd actually say no mixed sex sleepovers but it's not technically mixed sex. That's another argument altogether....

Honestly, if you don’t stop her going then you’re revealing you don’t think they are male. The right thing to do to show her you are completely not transphobic is to ban her from going.

I’m so glad this seems to have passed my 18 year old DS by.
His friendship group are all pretty stereotypical(in so much as there is such a thing) young men. They’re into going to football, PlayStation, gigs, going to town centre pubs wearing jeans, polo shirts and trainers.

I’ve had a conversation with him if he knows anyone who is trans or uses different pronouns etc. He said there’s one girl from school who’s now a boy but other than that it seems it’s totally off his radar.

My daughter (16) and her friends are the same....she says she's hanging with the boys.....they are all pretty and feminine girls who despite their claims like dressing up as girls sometimes and talk about fancying boys. But...being a CIS heterosexual (among other things) is the worse thing, to them, to identify as!
I say nothing as I am an old CIS heterosexual who doesn't "get it". I certainly don't get that 100% of a friendship group are actually trans bisexuals.
I don't care how people identify but this youth fad is boring (and insulting to those people truly suffering from gender confusion)

Do they 'dress as boys' or 'think they are boys'? Because those are different. DD 'dresses like a boy' with DMs, jeans, graphic Ts and short hair. She also rolls her eyes when asked her pronouns and asks why she should have to wear uncomfortable clothes.

She and all her friends 'they' everyone because when in doubt in produces the least cobblers responses. And actually, my 18 yo feminist self might have thought that was a good idea too.

Yes. This.

My teen DD is all about preferred pronouns, and you can't say "he" when discussing certain YouTube celebrities. But she is starting to come round with the sports issues.

Her older sisters have seen the light So there is hope.

She knows, they all know. Teenagers are not stupid. Let them get on with it, nod and smile and gentle teasing is how I’m getting though it. The children are victims of this, not perpetrators, and a supportive friend will be of more help to them. My children are well aware of my views on it, but I talk in general terms, not about their specific friends.

😂
These poor girls - gaslit at every opportunity by dodgy adults encouraging them to hate their female bodies at the very time when they need to be learning to come to terms with them.
As the Cass review pointed out - for many / most of them it will be a phase. For the mentally vulnerable it is of course a one way path to wrecking their bodies and future lives. 😡

Tell her you're not happy for her to have a sleepover with three boys and see how quickly she knows they're girls again.

Hopefully like push-pops and energy drinks it's just a fad soon passed. Bonkers the whole thing.