Article continues below advertisementDierks Bentley and his wife, Cassidy, have separate sleeping arrangements - despite still being in love after 20 years of marriage.The "Drunk on a Plane" singer opened up about why the spouses don't spend nights in the same bed, or even in the same room, during a guest appearance on the Tuesday, September 2, episode of Bobby Bones' "Bobbycast" podcast."I'm the world's most horrible sleeper," Dierks confessed, noting he's the kind of person who has "to be positioned exactly the correct way" in order to catch some Z's.