I think you've misread me. My point was the guy seemed to be suggesting some general human tendency towards extreme self-interest but then used personal pronouns ("I think to myself"). Not that people are generally seeking child brides. If you look at the position of the word "myself" your interpretation does not really fit.
No, as can be seen by the other comments in this thread the use of "myself" there is entirely appropriate.
He is using personal pronouns consistently: "myself" and "my children". "Their" children is the other children he is observing, and he is thinking to himself.
