Children are exposed to graffic sex on public network TV starting from BIRTH. You can see stuff on afternoon soap operas that you couldn't see in Restricted movies when I was growing up. Nudity, naked couples in bed discussing how great the sex was.
And don't get me started about the stuff on cable. 7 hours PPV XXX rated, $9.95, oral, anal, three-ways, bondage, gay sex - take your pick.
Then there's internet porn available on your phone, laptop or computer - for free!!!
All of which is more easily accessible than any books in the school library, and you don't have to take it to the librarian and have her see it as you check it out.
But keep believing that books in the school library are the problem. Continue to be gullible and stupid, and easily outraged at stuff that isn't happening.