They are sort of describing the Ferber method as brought to an extreme by Robert DeNiro in Meet the Fockers. It's not actually like the movie in real life.

http://www.babycenter.com/refcap/bab...leep/7755.html

And...that's still definitely not the only way to do it.

But all this doesn't really have anything to do with how he should handle his brother's gf.