Also in this week's column: What are the scientific reasons for having sex? How does a cross-eyed person's view differ from others? What can you learn from the sound of someone's voice? What are the most widely practiced religions of the world? Asked by Charlene Dupree of Toronto There are some 4,300 religions of the world …
And do all 19m of the hapless North Koreans practice it? Does it count if you don't have a choice?
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