They say that when it comes to birth order, "younger children may be pampered and spoiled, which can also affect their later personalities." Also, a youngest child "places others in service."
Not to change the subject, but I recently Facebooked my brother Caleb, who's the youngest of four. "I see your birthday is coming up!" said I.
He replied: "Yes my b-day is coming very soon!!! I need some new socks to whom it may concern. Just regular white socks....BUT they must be extra extra extra soft! If you don't want to sleep in a huge pile of those socks then they are not good enough for my feet."