Similarly, that's not in this book, but we teach her it's OK if a family has "two daddies", or frankly any configuration, and so on. That it's less common but it's normal.
I consider that appropriate sex ed for a n-year old, n<=5 or so.
Surely, surely, there is a tier for 5 < n <= 10. Clearly, not "here's how you do doggie style with 4 people while allowing for BDSM tendencies". But the world is so saturated with sex you can barely buy bread without bumping into it. If we're not teaching kids, well, anything in this space, they'll just learn off school corridor banter and any glimpses of porn their older friends will show them.
3rd grade feels a bit young to start with sexual anatomy and puberty tbh
Consent and personal space are separate subjects that probably aren’t prohibited under this new law.
The bill forbids only one of those three things, sexual orientation or gender identity.
There’s actually lots of good reasons, including proper hygiene, helping children understand consent, privacy, boundaries. But you’ve made a choice in how to frame the conversation that is designed to eliminate any need to learn…I can’t help you there but demands of ignorance shouldn’t be how we legislate.