Ok, so it's more aibu to allow / encourage this behaviour.
Fairly identifiable so here goes.
5 year olds twin boys, both have long hair like their Dad which I put up for school. Ones favourite colour is pink. Both adore Frozen so wanted the dress up dresses (Kristoff is a minor character). Last WBD they dressed as Goldilocks and Red Riding Hood (bear, wolves are minor characters). School have jokingly passed comment previously about pink bobbles etc but today I was asked, incidentally, if I chose the pink bottles or them, do I pick costumes etc.
I don't know if she's curious or implying I'm doing something wrong but it's got me second guessing
The choices are child led and I reckon they'll age out of them but I don't want to pull the "boys don't do that" line when girls have so much fun.
So aibu to allow them to pick so freely ? We've not yet encountered a request for a dress for general living, just they like to be Princesses!