'Future Booty Investment': This is the preservation of good terms with "ex" girlfriends and boyfriends, leaving the possibility of enjoying sexual relations sometime in the future. The term was created in 2006 by Colin A.N. aka Manimal.
James broke up with Carol three years ago, but they remained friendly. Later, Carol got married and had a child but her marriage ended shortly after his birth. Since Carol's divorce, she and James have been hanging out from time to time enjoying the FBI of their past relationship.