Killerman (and others)-
One other thing to consider here. A guy may chase after 10 or 15 girls over a period of years and only get one of them after mountains of work, but at that point he wipes his brow off and says, "Phew! That was a challenge of epic proportions, but at last I did it." He views his eventual success not as reason to doubt his method but as a validation of it (it works to get you a girlfriend, see! It just takes 2 years and countless sleepless nights!).
Then if you walk up and tell him, "Hey man, there's an easier way, just do the opposite of what you're doing now," he's going to reject it, because a.) he KNOWS how hard it is [according to his own experience, anyway], and he considers himself pretty clever, and it took him all that time and stress and effort, but he cracked it. Now you're going to tell him to do the opposite of what he now has evidence works? Posh. And b.) that'd mean that all the work he's done was pointless and the girl he ended up with (who wasn't really that hot or amazing) isn't really something special after all and he probably could've had 10 of her by now if he knew his way around women better. Most men's egos can't handle having their work invalidated and the women they've attached themselves to devalued, nor do they want to hear that it's time to start all over again, from scratch, something that was painful for them to get through the first few times.
It's like trying to get someone to change computer operating systems. You can present mounds of evidence at how inefficient his current operating system is and how the one you want him to switch to is going to save him so much time and energy and make him happier and less frustrated, but once you know an operating system you're almost never going to switch (Windows users: want to switch to Mac? Mac users, want to switch to Linux? Linux users, want to switch to Windows? Didn't think so, on any counts. Or let's say Android and iPhone. Who here wants to switch? And I'll bet you think anyone using a different operating system does so to his own detriment and discredit).
In this case, you're asking him to change his girl-getting operating system, which is even worse. It's like trying to get an old guy who's done accounting with a pencil and notebook for 40 years to learn to type and use a computer. Even if that means he can do his job in 1/3 the time he's going to laugh at you and tell you those newfangled machines have nothing to offer him, and think you're mentally soft for needing one.
Chase