This morning, Sweet M lounging on bed, Mothersvox working at desk adjacent to bed.
Sweet M: Hey M*, can I ask you a question?
Me: Sure honey . . .
Sweet M: Well if a boy has a sister and a girl has a brother and then they grow up do they get married?
Me: Well, no, there is a rule against that. There's actually a law against that.
Sweet M: It's a against the law? Like you could go to jail?
Me: Yes, it's against the law.
Sweet M: Why is it against the law?
Me: Well, if the brother and the sister got married and had a baby, the baby would have a big chance of being sick, so people aren't supposed to marry their brothers or sisters.
Sweet M: Oh. [Thoughtful pause.] So the boy would have to find another lady to marry.
Me: Yes. Then they would start a new family.
Sweet M (incredulous): You mean I'll start a new family when I grow up?
Me: Yes, I think you may.
There were several digressions that involved DNA, and why I haven't married any of my brothers, and why Fathersvox hasn't married his sister, and how his sister found someone else to marry instead of marrying Fathersvox. But essentially, that's it. We've now discussed the fundamental rule on which civilizations are based, the incest taboo, and we're ready to go to the newly opened playground swimming pool.
* Sweet M has been calling me by my first name for a while now, but since we have the same initial, it can be confusing . . . We're M & M.