I think that firstly, do we have many members under the age of, say, 8? That was probably about when I learnt about reproduction. Children are naturally drawn to mystery and intrigue, hiding thing from them just makes it worse.
I like how they handle it in Holland, kids get sex ed from 3 onwards. They have far lower teen pregnancy rates than the UK for example and a healthy attitude towards sex. It seems that most dutch kids are happy to wait.
Ed, I was with my son on a farm trip on Friday and most 5 and 6 year olds ( Kindergarden Class ) knew more about animal parts then I did..
I must say kids are very smart and need to be treated with respect.. Although we did not encounter any "sex" that day I would not have been surprised if most of the kids did not already have an idea about it..
Again, age appropriate discussion is how to deal with this issue..