Annoying girlfriends are generally insecure women. They constantly look for attention -- a byproduct of their desire for affection -- and for some kind of recognition in a world that doesn't give them any.
Some have "annoying girlfriends"; that is, girls who feel the need to check up on their boyfriends every minute of the day, questioning their every move, asking irrelevant questions and making their lives miserable. Although they are well aware of their behavior, they continue to do it since their boyfriends put up with their insistent queries.
But that isn't the whole truth. These women -- the kind that men consider annoying or constantly suspicious -- are often this way because they are insecure within the relationship.
Of course, there are women who were born to nag and add an extra coat of stress to our already stressful lives. Most women, however, are not maddening by nature, but become so when their partners fuel their insecurities. Women can be very complicated, but the reasoning behind their feelings is often simplistic: They want to be loved. This feeling ranges from the strongest of feminists to the meekest of shy girls. Most women need validation in life, and the best way to validate them is to let them know that they're cared for.