I love the idea of Gabe and Jack having been together before the fall. Then after Reaper is aware who Jack is but Jack doesn’t realize who Reaper is. Despite that when both need to get off Jack lets himself be found by Reaper and after a fight they have some fun. Or Reaper actively seeks out Jack and fights with him then they get it on. They always come back for each other. They never find anyone else that works for them because no one can get them off. Even though Jack is clueless about Reaper.