We had a course on this last time at church, and it is indeed an interesting discovery. And we did it on kids too. Mine is combination of words of affirmation and physical touch. But sometimes it can be the other 3. Haha.
I guess most will be combination of a few. Anyway, the top in list will be quality time. :)
Cool! I didn't know they studied that in church!
I think it is very practically useful to know about the languages of love and to support people around as they need it.