Oh well....i'll throw in my 2 cents anyways.

I'm a new Dad, and although my baby daughter is only 9 months now, my wife and I already have an idea. She (my wife) suggested their first exposure to it might be something like how animals have babies (the zoo or discovery channel or whatever)...I thought it was a good idea...the kids can learn about the "mechanics" of how mammals mate from a young age, and then they can be taught the proper context (as well as how it applies to people) as they get older.

What do you guys think?

I also agree with a lot of the other posters here that there is no "set" age...it will vary....but it's definetly something better addressed than left to the media to teach ones kids. Ah the joys of parenthood =).

Stay safe all.

Perfection does not exist. The question therefore, is: what level of imperfection are we willing to settle for?