From the Nest's main page:
The "New" Birth Control: Pulling Out

It's here -- the birth control you've been waiting for. No more pills.
No more messy condoms. No more shots or rings or spermicides. So what is it?
Well, the withdrawal method. Otherwise lovingly known as "pulling out." No,
that's not a typo. Researchers at the Guttmacher Institute have released
a study saying that not only is the withdrawal method
effective at preventing pregnancy (most of the time -- and only if used
correctly), but that women in their late 20s and early 30s are ditching condoms
and opting for, ahem, the luck of the withdrawal.
Methinks there's about to be a baby boom...
Re: Have we discussed THIS?
This, but we did it for 5 years, not 8. If you are in tune w/ your body, it's basically natural family planning.
Christmas 2011
Liam is 5!
I agree that IF you are in tune with your body and know when you ovulate (aka when to avoid) that it could be fairly reliable.
That being said, MOST young girls, or for that matter, most women, are NOT in tune with their bodies and do not understand ovulation and fertile windows and so on, so it would not be a good suggestion.
Not a method for us.
My friend practiced this method and has two kids. Not such a great method if it is the ONLY method. In other words, if you completely rely on a man pulling out in time then it it may not work. There would have to be other steps taken to ensure no pregnancy resulted. One of them being that the two are mature adults to begin with. I remember my friend telling me that when their second child was conceived her husband decided not to pull out and she was mad and asked him why he did that. His response was because he didn't want to. Great thinking there, huh?
Anyway, I would say that the pull out method is not one to be taught to young couples.