Wow, this is a good read.....there is a lot of good information here.
I have given the topic of "sharing absolutely everything with a woman" a lot of thought in the past and have concluded that like it or not, it will come back and bite you in the ass when you least expect it.
Here is something I figured out after years of observing women's behavior:
Ask a woman what kind of guy she likes and her "text book" answer is Tall, Dark and Handsome.
What does this really mean? There is a ton of sub context in these three words, let me explain;
Tall = confident, good posture, strong presence, assertive, etc.
Most people assume that Tall=height only, but I'm sure you know tall guys that are wimpy, and have trouble attracting women. Likewise there are short guys that do very well with women because they have the real character traits that women are attracted to.
Dark = mysterious, slightly troubled, slightly hot tempered, shady past, etc.
Again most people assume Dark=dark skin only. Getting a "lovely" tan is not going to make you a better person, the most it will do is hide your skin blemishes better and make you a little healthier looking.
Handsome = well groomed, takes care of himself, dresses well, attention to detail, etc.
Most people assume Handsome=genetic looks. Looks do play a role in instant attraction to women, but it is the "overall appearance" of a man that is going to count the most in the end. Women are always "sizing you" up and down for these indicators of alpha masculinity just the same as when we are constantly scanning women for indicators of fertility (breasts, hips, etc.)
Try to enhance yourself to meet as many of these requirements as you can to be more attractive to women. God only knows that women are always enhancing themselves by wearing push up bras, those damn sexy yoga pants, red lipstick etc.
By becoming an open book with your girlfriend, you will lose your mysteriousness(Dark side) to them and become less attractive. It's not that women are evil and shallow, it's just something that is deeply encoded in their female genetics to help them choose the better person to mate with so their offspring will have a better chance themselves.