[0] http://www.amazon.com/What-You-Change-Cant-Self-Improvement/...
He argues, quite convincingly, that girls raised as boys still like dolls and boys raised as girls still like firetrucks and bulldozers.
I would recommend the book.
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For anyone interested in the topic (and CBT in general) I can highly recomment [What You Can Change and What You Can't - The Complete Guide to Successful Self-Improvement](http://www.amazon.com/What-You-Change-Cant-Self-Improvement/...) by Martin Seligman.
As someone who has recently developed a bit of an obsession with mindfulness/zen/meditation, this book is a good example of the parallels between that and the field of psychology.