I say do it.
When I was a teen, I knew some guys and girls, who came from very religious houses, they were not allowed in sex ed classes.
One of the girls learned on her own, her parents still thought she was a little angel, in the mean time she was doing the whole football team.
Sometimes your kids end up being different people then you think they are, and you may think your kid wont have sex before marriage so they do not need to know about safe sex, but they could be out doing the baseball team.
Kids should not die from aids or other STDs if we can help it.
Not a bash on religion, I knew kids who took it very seriously, and did not want to have sex. This is not a bad thing in my eyes.