You're probably right, SRS.

True confessions, I let my son sneak a copy of "Everything you wanted to know about sex but were afraid to ask" into his bedroom and pour over it with his cousin. I think he was 12 at the time. By the time my girls were interested in knowing more, it was out of print (and pre-Internet search) so we moved on to Dr. Ruth's book. I even provided one to my daughter's friend whose mother was hopeless at helping her daughter to understand anything about life.