Just picture any hot woman you'd never approach, because you are SURE she must have a boyfriend, and if she doesn't, then there must be something wrong with her.

If you are in a committed loving relationship, you would have no trouble chatting up anyone you would normally be attracted to, because you don't have an agenda; all of the sudden, you're one hot cookie.

So if you're single and looking, the easiest way to connect with people you're attracted to is to approach them with no agenda. Become as sexually detached as you can and treat them like a buddy.

Of course being buddies with someone you're attracted to can also lead to sticky situations, cf http://xkcd.com/513/

Actually, it's really quite simple. Just follow the step-by-step instructions here:

http://www.youtube.com/watch?v=_n2IVF9a2IA

and here:

http://www.youtube.com/watch?v=WCEYxs7kWmQ

Most beautiful women in their teens and 20s do have boyfriends. That doesn't prevent men from approaching.

Regular, socially outgoing men approach. It's nerds who talk themselves out of it. Think of salesmen. Salesmen start conversations with strangers all the time, and turn them into sales or network connections or women they sleep with that night. Starting conversations with strangers is for them the bread and butter of life. For nerds, it isn't.

Also, these beautiful young women with boyfriends give out their phone numbers. And they switch boyfriends quite frequently.

I don't think you can assign the highly socially outgoing (as you described here) as "regular" people. They're outliers just as nerds are. I'd wager that most people just "get by" in varying degrees... though how you would prove or disprove my hypothesis, I have no idea :)

The author's opinion of his friend's attractiveness may be exaggerated.

The illustrations are pretty good though--I'd use him for that social network webapp I'm writing that's going to take over the world.