When we interact with new people, the most common reaction we get is "How am I (their age) and I didn't know this?".
So if you are looking at these diagrams in surprise, you are not alone and welcome to the party!
We see the anatomy as a beautiful shape, a part of our bodies to celebrate and a symbol of pleasure for everyone. Since still not widely known, it also often inspires deeper conversations about "What else aren't talking about?"