Relax. There are probably more urban legends about sex than any other topic. And probably more about anal sex than about any other sexual topic...
If you're enjoying it, then you're probably doing it "right". Trust me, when you do it wrong, you
know about it. Having done it both ways, I know whereof I speak.
I wouldn't sweat it too much if I were you. If you want a real answer, look for a homosexual man in a long-term relationship. They can tell you the real deal about regular anal sex.