sometimes we all drift off into our own little world, sometimes its to save us from boredom, others its to save us from bad situations. either way the majority of the time when it does wonder it takes us to our safe place/happy place where nothing can harm you or bring you down. now and again we just wish we could stay there, and then reality comes crashing through and brings you back to what you wanted to avoid. Then there are the bad times when you drift away and over think things, come up with scenarios which will never happen, but you convince your self they are happening now. These times can not be helped, but its is best to ignore them as nothing good usually comes from them.
so to all you day dreamers out there, i hope when you drift away you go to that happy place, as reality can be a shity place but we just have to deal with it and day dreaming helps us through it.