#2 Sharing the same repertoire of pop culture knowledge with my wife

Only one person can understand the sideways comments, noises and general nonsense that comes out of my mouth in any given situation: my wife.  And this is because only she shares the same unique blend of cultural knowledge I do.  Aside from the fact that we've spent the last 10 years together (and that's college, university and a whole lot of Seinfeld and The Office), we had a similar upbringing, listening to the same obscure Christian bands and the same Baptist preaching.  If you can immediately identify the source of "Just a loop and some lyrics", "Shwety" and  "I'm losing it, Jerry" you are 1% there.  Knowing just what to say and when is a remarkably rare skill.  Sharing this with one person year after year only hones that skill further.  I foresee a day when we can have a lengthy conversation entirely in code.  It will be shwety.