All they really have to do is state that some people are attracted to the same gender, some are attracted to both, most are attracted to the opposite gender, and some are not attracted at all. Also, that there are people who are born with a female brain and male genitalia, and vice versa, or with undefined genitalia. These things all occur naturally, and in many different species. There are no diseases that only "queers" get, and most people contracting AIDS now are heterosexuals in Africa. The end.
Different sexual techniques is another matter; there are some between heterosexuals that you'll find yucky too, like anal sex, right? There are probably one or two straight people who've also "experimented" with various objects; heterosexual couples have five orifices, ya know, while a gay couple only have four, and a lesbian couple have six.
Children should be taught that they, and they alone, decides who touches them and when, that no adults have any right to do things to them that they feel uncomfortable or unsure about.
Pedophilia is a pedophile thing, not a gay thing, especially as most pedos are straight males. Judging by the ferocious hatred you seem to hold against gays, you're probably a straight male homophobe.