I remember being in grade school thinking how cute a little boy was, giggling and laughing with my friends. Come on you remember the boys thinking we were yucky? Now I know why!
So finally they found the truth. That is Newcastle University. As our brains reorganize, that is change connections, it happens earlier in girls. This is most notable during our teen years. Ok, so by age 40 we finally got it! Our connections are complete and our brain is “streamlined” to keep all the integrated information.