Hmmmm . . . I ponder if driving in a car or what the setting may be to select a choice from. I seem to remember odd ones like see the same thing and say it aloud while driving from here to there and someone would slug the other persons arm. Did that as kids and young lovers driving somewhere too.
Then I like to play spades and hearts, although that can be more than two. I kinda' feel even thought two couples, each couple as a team are really one.
As a kid a familiar game was who could swing the highest, run the fastest, and too tell the biggest whopper of a tale.
Oddly I guess I am thinking of those as a kid most and not as an adult. Maybe it is the season, I dun'no . . .
Trivial Pursuit, beause it's interesting and you learn things, and Scattegories, because it's still fun with only two people and it's a good game to play when you don't want to think too hard, but instead, just want to have a fun, easy sort of time--without worrying too much about competition.