I think that my kids' ears are tuned in to the sound of my bedroom door opening. It must have a certain pitch that I simply can't detect because I'm an adult or something. If they are all in the back room and I have to go to the bathroom, so I open the door to my bedroom to go to the bathroom, within seconds all four of the little buggers are following me into my bedroom and then standing in front of the bathroom door until I'm done. What's with that? Can't a mom get a little privacy here? What's so exciting about my bedroom that they have to be in there?