Sims kissing on the cheek when first meeting?

Is this new? I've seen my sim do it a few times now with people she didn't know (they don't have romantic interest.) On another note, I also got a notification for a update to my game (I already had updated to the Nov 7th patch when I did this. the file size was 67. smth MB.) Could it have come with that? I don't think it's an interaction you can physically choose from a menu, I was invited to Sergio Romeo's house, he wasn't there, but my sim went up to Joaquin and kissed him twice, once on one cheek, next on the other. I think it's kind of cool but I wonder where it came from?

I don't have pictures but you get the idea. (: