Read what book.of Jung?
Jung wrote a lot about the ‘anima’ and ‘animus’, and the possibility of an integration of what amount to polar opposites within the individual. But Jung himself can be very dense on the page; I’ve preferred to start with interpreters and proponents of him:
http://www.youtube.com/watch?v=exqL4C2u7HA
http://en.wikipedia.org/wiki/Anima_and_animus
However, Jung could be very straightforward and charming in person:
http://www.youtube.com/watch?v=2AMu-G51yTY
(I’m not a psychoanalyst, and don’t play one on the Internet :-)