In some ways a secret needs a good support team. In Clark's case it's always been the Kents and (sometimes) Lois (at least part-time.) It's one of the things that I think the new52 is lacking (to detrimental effect).
CLARK: No. I'm just worried I'm a jinx.
JONATHAN: A jinx?
CLARK: Yeah. Let's face it, ever since she's known me, Lois's been kidnapped, frozen, pushed off buildings, almost stabbed, poisoned, buried alive and who knows what else, and it's all because of me.
-"Contact" (You're not her jinx, you're her blessing.)
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