It was a thank you for saying, “Hello.”  Just a peck on the cheek.
I viewed this as a small gift and I remember what Dean taught me: (The painting called Dean #1 was painted in his honor.)

1.  “There are Two kinds of gifts.” he said, “One is a present you think the receiver REALLY WANTS;
2.  The other is THE present YOU REALLY WANT TO GIVE.”  nancymauerman.com