Its a known fact, that most girls are naturally secretive. They tend to hid alot of things about themselves or the things they do...some are always feel with guilt, while others dont even give a hoot about it. As they keep on lying to cover up their deeds. Many even end up getting married and living with it for the rest of their lives. And constantly watching their back and afraid of their past...

They do so because people who cannot disappoint them when told the secrets are FEW. Another thing is that men quickly underrate women when they (men) discover the bad deeds of the women but women on discovering the bad side of men, tend to condone them. For instance, a man will easily divorce his wife if she is unfaithful. But many women will endure their husbands unfaithfulness forever, while the few women who can't endure it forever wait for a long time before divorcing the husbands. So, na condition make crayfish bend. Men hardly reciprocate women's endurance and tolerance. On the other side, women don't reveal their secrets to their friends (fellow women) because the friends can use the secrets to rob them of their men.

I think most of them are naturally design that way.