I was reading one of the fics on the archives, and it happened to be one of the stories in which LnC have kids, and i got to thinking, when exactly is a good time to tell a child, "your father is superman"? It seems like Clark would have to be very careful about what he does in the house for a long while, especially if he has many kids, cause even if one is old enough to know he still would have to keep up appearances with the younger ones. I would also imagine that having superman as a dad would sort have be like having santa as a dad.