If you really believe that, then you are incredibly naive. I'm not the original poster, but I am >>2 from the prievious thread, and I've been the one explaining bottling here in this thread as well.
It's something that many people do, and I don't like that it's so misunderstood, because it's something that can benefit pretty much anybody due to how convenient it is. You simply place the tip of your penis against the bottle's mouth and release. No fuss, no muss, and pretty much zero chance of spraying off-course and making a mess.