I dont know where you live Yendu, but I personally dont know of anyone who thinks or would teach their children that same-sex anal intercourse is a good thing. Besides being unsanitary and disgusting, it is a serious risk to your health. Ask any emergency room doctor in San Francisco.
In certain public schools in Massachusetts and Vermont, and in more limited circumstances in New Jersey (where I live), kids are being taught explicitly about homosexual sex practices (including anal sex). This has occurred in our public schools. In some instances in Mass., they have been told that anal sex is OK if you where a condom, and that one should experiment with it to find out if that's 'the way you are.' Kids in Massachusetts have been taught about 'fisting' (inserting your hand up someone's rectum). Kids in Vermont have been introduced to gay pornography through gay-straight alliance clubs. Do you know what's being taught at your school?