Read on Twitter
It's unfortunate that the "our brains reach full development at 25" is so misunderstood that the way it's invoked it's practically pseudoscience. The reality is that the brain develops in a lot of ways, and some reach full development sooner than others.
Specifically it's in reference to the prefrontal cortex reaching full development at around 25 years of age. This has nothing to do with gender or sexuality, but rather with executive function. Someone might look at this and argue that gender transition
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3621648/
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3621648/
qualifies as impulsiveness, but generally speaking trans people spend years thinking about this and one's gender develops fairly early in life (3-4 years).
https://www.healthychildren.org/English/ages-stages/gradeschool/Pages/Gender-Identity-and-Gender-Confusion-In-Children.aspx
https://www.healthychildren.org/English/ages-stages/gradeschool/Pages/Gender-Identity-and-Gender-Confusion-In-Children.aspx
Trans people don't always have that knowledge at 3-4, but most who don't do at puberty. Being trans is a variation, but the idea that kids will think they're trans because they're "too young" and their brains haven't developed is purely pseudoscience.
The assumption that everyone must be cis can interfere with a trans kid's or teen's ability to identify that they're trans. They may end up believing their feelings are wrong or not even understand them as what they are because everyone says your gender is set at birth.
Orientation is not 100% the same of course, but kids can know before adolescence. They don't always, and the assumption that everyone is straight can make it hard for many to realize they're not straight for years or even decades.
https://kidshealth.org/en/parents/sexual-orientation.html
https://kidshealth.org/en/parents/sexual-orientation.html
I know transphobic GC asshats aren't going to bother to do the research (or believe it if they do it, or admit it if they believe it) but a lot of people don't know and when someone throws out the superficially accurate factoid about brain development at 25, that might sound
reasonable, even though it's about as accurate and realistic as claiming the Earth is flat, that evolution isn't real, and that vaccines cause autism. Which is to say, 100% inaccurate.
Also this. I get focused on countering specific claims when the situation is far more complex than I actually knew enough to say. https://twitter.com/bi_gendian/status/1303908897103675395
Also, apologies for this bit I didn't realize when I clipped it that it's doing a lot of bi erasure. Obv the section should apply to *all* sexualities, not just gay or straight. And sexualities aren't a "phase." https://twitter.com/lisaquestions/status/1303891332021116929
