Why Is There No Mute Button??

why are girls SO loud?  Sometimes I wish I had a tiny remote that would allow me to mute some people.  Or at least turn them down several notches.  I never really noticed just how loud women are until the last few months.  I have been working in the slower section of my store lately and this section of the store is catered to women. Which means when I do get people in my store they are usually traveling in groups.  For some reason they all feel like they need to talk over one another or that their friend has suddenly become hard of hearing and they need to shout even though the friend is only 2 feet away.  Doesn't matter if they are 15 or 50 the behavior is still the same.  Or the other thing that happens is that groups of women will walk past my store and I will hear VERY clearly the details of their conversation.  When I am standing at least 30 ft from the entrance I should not hear a conversation going on outside.  I have thought about this a lot lately.  And being as I am a woman I should just know the answer-no thinking needed.  But I am going to refrain from including myself here- I am not, by nature, a loud person.  I rarely need to be the center of attention and I generally prefer to listen to others than to be heard myself.  (Probably the product of being #5 of 6 kids.  It's just easier to accept your fate and move on)  Don't get me wrong- I like attention and I like people to listen to me- but only if they want to.  I don't like to fight for what I should naturally be given.  Anyway, in my musings about this I have drawn two conclusions as to why women are so loud.
1.  They are super self centered and feel that everyone should pay attention to them 100% of the time.  That what they have to say is more important than anything anyone else might have to say.
2.  They have a total lack of self confidence.  They need attention to make themselves feel important.  They are afraid if they aren't the focus of the conversation they will be over looked and then they feel insecure. 
Which one is it? Both.  Just depends on the girl.  I think both are sad though.  And both create a behavior that I find incredibly annoying.  Take it down a few notches- the whole world doesn't need to know your life.