January – You switch bodies with X
February – X cries on your shoulder for a good 7 minutes
March – You rob a gas station with X
April – You sing karaoke with with X
May – You prank call X
June – You go on a blind date with X
July – You play poker with X
August – X will file a restraining order against you
September – You explore a haunted house with X
October – X is now your permanent roommate
November – You must arm wrestle X
December – You have a rap battle against X