I agree with you UV knowing the correct names is not going to encourage children to have sex
I feel that a lot of people are horrified about about having there 5/6/7+ years old taught about sex because they haven't listened to the news properly or read the reprts etc....
At such a young age they are only going to teach about the realationship aspects etc...
Not give the ins and outs (excuse the pun

) in glorious details
I also think it is a good idea because most parents with 5/6/7 yr olds rarley explain anything to do with bodies and realationships as it just doesn't come up, but if it is an issue brought up at schools and children feel comfortable with their bodies, they will also learn that it is
their body and no one has the right to touch them if they don't want ( i think some cases of abuse could be stopped as the children will know right and wrong from an early age and will speak up--hope that makes sense)
Sorry i drifted then UV

As for the right names for their bits and bobs mine call them other things as i find Vagina and Penis sounds very hard coming from a little mouth