'I am a woman' - Bruce Jenner in his own words (watch the video)

It's been difficult for me to comment on this because I don't understand it. How can you live for 65 years of your life as a man, married three times, had multiple relationships with women, had 6 kids and all of a sudden you identity as a woman and want to wear female clothes? But you are not gay and have never been attracted to men? I don't get it. Watch him attempt to explain it..