{The experts at the help centre estimate that these boys could only have known about such sexual practices from pornography.} This doesn't really make a whole lot of sense to me. First of all, there are enough implications around about such acts that are not pornographic (jokes, television, movies, etc) that it wouldn't take a rocket scientist to get the gist of the idea. As I recall, I had heard of both oral and anal sex as a child long before I EVER saw any erotic or pornographic images or movies. And if people could only get these ideas from pornography, how did the practices start in the first place?