So, somehow when I was reading Orange Iguana's Evans Jail Immortal Dynasty, I missed the part where Match Maker (social networking) is bugged - it's not registering as complete for me, though my Sim in question has met 32 friends via the Sim Finder app, and has turned all 32 of them into a Romantic Interest with one of the other 32 (for a total of 16 couples). Somehow, his dead parents and his dead in-laws are also showing up, so he match-made his parents as an RI with each other, and his in-laws as an RI with each other too.
In desperation, I even took the sim and his wife on a holiday to France to start matching the French and the Explorers.
Then I went back to reread, and saw that she had indicated the challenge is apparently bugged and doesn't register as complete, though they are.
May I count this challenge?