What makes the femur so special that it should be atop this “cast system”?

These two terms are referring to two entirely different things, but for many they are interchangeable. And one is more “loaded” than the other. I think it’s amusing that we have to find new names for concepts that have become too “political,” and it’s fun to think up the names too.

Get your head out of the gutter, this is nothing more than some innocent anatomical flirting. Who knew the collarbone could be so beautiful?

If it wasn’t Sheldon my money is on Koothrappali. But the story is true. Read about it here.