It is my way to say “love/miss you”.
Probably I don’t express myself well in this aspect, I would either kiss (my children) or gently tap (with two fingers, e.g. index and middle; for friends) on the forehead.
Today, I missed many good people. Sobs. Wish them all the best.
Of all the billions of people, we managed to share our lives together. A friend said, it is “fate”.