Why do dogs insist on sleeping perpendicular to the long axis of a bed? When Duke stretches out he can span from one side of my king size bed to the other. This ususally results with his head on Dukesmom legs and his back legs shoving against me. In the middle of the night I sometimes get so scrunched over I will get up and, with some effort, realign his body in a more parallel position only to have him stand up, turn around a few times, then re-plop back to a perpendicular position. Do they align themselves with the earth's magnetic fields or are they possibly guided by sub-atomic particles steaming down from the Dog Star Sirius? Just wondering.