At the dinner table James responded to something said with, "that's because I'm a boy." I told him that was untrue and that at his age, girls and boys can pretty much do the same things, but that as he gets older, there will be more differences. I also told him that there were things that girls can do that he'll never be able, and things he can do that girls can't. I gave him the example of the fact that he can't have kids, but that eventually Jade will be able to.
My incredibly smart child responded with: "Well actually Mommy I *can* have kids, I will just be unable to give *birth* to them."
Yup, I got schooled by my six year old on being able to give birth.