Its just mainly because it become very wired into your mind, because it happened at such a young age ,that know your older it feels ok and right.
I would say seek professional help.
Its hard to say what level is this is at, I mean doe sit affect your ability to do things, doe sit feel...
Whats a good website that is something like yahoo answers expect just relates to sexual questions, in general from positions,protection etc.....
I find on yahoo answers I don't get any good answers or any at all, maybe I ask at the wrong time lol
Also I don't want a porn/dirty website thats...
Maybe its the TV....just a thought?
or replace the whole AV maybe something is still burnt out.
good luck, or check the warranty and get it returned :)