Paddyann - this “Christian” (your term) parent removed his child from inappropriate sex education. I know that many other parents, including those with no religious faith, would consider that teaching 8 & 9 year old children about anal sex is inappropriate.
I also know that many GPS are having to deal with sexually active teenage girls with injuries from anal sex that they're too embarrassed or ashamed to talk to their parents about. These girls are not only under age but are having anal sex, not because they enjoy it, but because their (also under age) boyfriends are insisting on it. Teachers, porn and the internet have a lot to answer for.