Kids ask all kinds of questions that are much harder to find an age appropriate (I.e. comprehensible, true but not TMI) answer to than what is the clitoris for. ... why is the sky blue, how did the world begin, what happens when you die, why do trees lose their leaves in winter etc...
I don't think just knowing that the clitoris has a name would make every child immediately hung up about what's it for (afterall what is the earlobe for,the uvula, the septum etc..) .
I wouldn't wouldn't be filled with horror with them knowing though. 'you rub it and it feels nice' is a pretty good first explanation of what it's for - it's for feeling nice, why would something that feels nice need further explanation? Any kid can tell you that - what is thumbsucking for? Hugs, kisses, tickling, rocking babies stroking cats.
I don't think it's a discussion that leads directly to the topic of sex, but when you are talking about sex it might come when you say that people do it because it's fun and it feels nice.
I think when you tell children about sex you should tell then the truth simply, in small doses, as much as they want to know. If they have a misconception you should clarify it, not try to keep them believing in a lie.
I don't think letting them carry on with the misunderstanding, (or leading them to believe) that people only have sex for reproduction is being open. It's not a simplified version of the truth. It's just not true.
That people have sex for fun is not a hard concept for a kid to grasp (grown ups do loads of things for fun that kids don't see the point in). That your parents have misled you about that basic fact for years is harder. I can see why you wouldn't want them asking questions about the clitoris in that case. But it's not really a hard thing to explain, it's only hard if youve not been honest about other stuff.