Exactly, they should be mature enough to handle it. My kids are innocent about those things, too, and we’re glad we were able to help them preserve that innocence.
I do think that one person’s definition of “sex education” is very different from another’s. For example, as soon as my kids started asking about the facts of life, I answered honestly about babies, how they develop, giving birth, the differences between men and women, etc. What I didn’t tell them about was sexual intercourse or sexuality (and definitely not about homosexuality). The parents should decide what information a child should be given and when.
Obama did not specify exactly what he thinks kindergarteners should know. He sidestepped the question and was purposely vague.
The one thing you can be sure of is that children will be told to distrust their parents; if it feels good, do it; and that all forms of sex are equivalent and normal and not to be avoided. Above all, don’t be “judgemental”. The state, by usurping the role of the parent is hastening the breakdown of the family and encouraging the adolescent to look to the state for answers. IMHO