Basically, anything that has at least something to do with sex or nudity in material meant for kids: Girls in bikini in computer-games, female-body descriptions in children books, clues for sex in cartoons, movies with "bad language", and anything else that horny pre-teen will seek out, and is still quite "harmless" to their young minds.
2) Pedofilic pornography (you sick fucks).
Eddie(12): Hey you're right Chuck! Better turn it off before mom sees, though.
George(17): Wassup kids, watching your kiddie porn again?
Eddie(12): Why won't you get us some real porn, big brudda?
George(17): Sorry, you're too young for that, little perverts.
2) You want an example? You are sicker than I thought.
Viewers preferring this material are likely to be under-age themselves and seeking erotica of their own age group rather than material which would, for them, be teleiophilic or gerontophilic.
Usually refers to child pornography and sex acts (also known as kiddie porn,) which are, of course, illegal in most countries and also considered evil, immoral and perverted by most of Society as a whole
Thankfully, most hardcare child pornography is actually very difficult to find by the common internet or file sharing user as it uses codenames created by paedophiles to share with their files with one another
See also: "Politics and the English Language" by George Orwell (http://www.calvinvanhoek.com/articles/2007/04/politics-english-language/)