Nocturnal emissions

Deuteronomy 23:10-11 If one of you becomes unclean because of a nocturnal emission, then he shall go outside the camp; he must not come within the camp. When evening comes, he shall wash himself with water, and when the sun has set, he may come back into the camp.

I bet they don't teach this in health classes now. The night after they teach it in class a large groupd of boys head out of town and won't come back till the next night. They won't tell anyone why. The headlines might be hilarious. Anyone have any ideas??