psychology of blogging revealed

ok the title is misleading but is it not always funny how people are so much drawn to reveal so much of themselves in terms of blogging but in real life they are less than thrilled when someone asks what is considered a personal question.
I am actually one of those people, I can talk non-stop when anything concerns anyone but me (unless that thing which concerns me is to tell me how pretty I am or how well I did that presentation or something like that), but once you ask something which i consider to be personal I somehow switch off and try my very level best to be vague. why the secrecy?? I wonder..
what is it about us humans that makes us want people not to know so much about ourselves?? yet are willing to share a lot of information with strangers.
One book that i read somehow tried to answer the question. when this guy in the book was asked,' why are you afraid to tell me who you are?' he answered, 'because Im afraid that if i tell you who I am you might not love me anymore, and your love is all I've got!'
we are always afraid that when people realise that we are not really goodie goodies as they think we are they might not like/love us as much as they do. we are prepared to live in an illusion as long as that illusion includes people who think they love us.
I think that is one of the reasons I respect prostitues, most of them are very courageous women, that fear that gripples most people of losing the respect from people once they discover who we really are has somehow diminished in them, its either you love the person as he/she is or leave him/her.
yet people, still feel that pang in them that nobody knows them and that hurts. how many times I have read and heard such kind of exclamations
"no one on this world really knows me well..' sometimes this is said as a complaint, sometimes with a sigh of pain and sometimes with frustration.
That is why the blogging business has fired up so well. it has filled that gap in people that was created by the fact that no one wants to lose their loved ones by telling them who they really are, instead they can simply create a blog and tell it to the rest of the world without fear of diminishing the circle of 'loved ones'.
I admit this is somehow a very pessimistic view of blogging, perhaps, though I beg to differ that it is that pessimistic. I know few of you might yell at me that this is not the whole story. True, there is never one explanation for any phenomenon so I bet there are other reasons for blogging but may I remind you my dear reader that I am simply concetrating on those people who right the story of their lives as I am going to do on this blog. If you will follow this blog you will perhaps realise why I really don't want to share with my loved ones some of the things I say here, but why on the other hand I would not mind to share with an anonymous reviewer. Writing things down somehow organises thought processes and hopefully one day most of us might actually grow up and realise that there is growth in letting people come close to one's heart.