Riddle me this, Batman:

We have trained our boys that when they wake up, they need to stay in bed and read.  They are not to get up, wake each other up, play around, be loud, etc...  They still don't have it down pat, and we constantly have to remind them.   Now Princess C on the other hand, is told that when she wakes up, get out of bed and come to me.  Normally, she lays in bed crying and yelling, "I want mama!"  (And it's only a fake cry, because when I get in there, there are no tears.)  When she yells, she wakes up Baby B and that is why we are trying to train her not to stay in her bed.  Yet, she can't get it.  Why are they so backwards?!?!?