That's an interesting point, perhaps it was a sneak attack to try to catch the candidates off guard and talk specifically about an issue that is no longer "hot." Overall, she was a terrible moderator, though... it's not really her place to try to catch them off guard. Her job is to ask the questions that will help the voters the most. Alas.

But as for condoms, politicians just can't talk about it like that. If Edwards said that condoms should be available in schools (hypothetically, this is just an example) they would twist it around and say that he wanted high school students to have casual sex. It's just not safe territory to get into, so it's good he steered clear of it.