http://westhunt.wordpress.com/2013/03/16/dan-freedmans-babies/ has an interesting story. I won't spoil the punch lines, but here's the intro:
Daniel Freedman was a professor of anthropology at the University of Chicago. For his doctoral thesis, he did adoption studies with dogs. He had noticed that different dog breeds had different personalities, and thought it would be interesting to see if personality was inborn, or if it was somehow caused by the way in which the mother raised her puppies. Totally inborn. Little beagles were irrepressibly friendly. Shetland sheepdogs were most sensitive to a loud voice or the slightest punishment. Wire-haired terriers were so tough and aggressive that Dan had to wear gloves when playing with puppies that were only three weeks old. Basenjis were aloof and independent.
He decided to try the same thing with human infants of different breeds. Excuse me, different races. [snip the rest]
I love reading about interesting experiments.
Hahahahaaaa!!! That is ME laughing at YOU, cruel world.
I could not love thee, dear, so much,
Loved I not Honour more.