Thank you for all of the responses!!
I, like many, grew up with a mother who never showed affection (unless we were in front of other people and then it was/is a grand show) and a father who hugged and kissed us freely.
It's interesting because I am extremely uncomfortable even just hugging my mother, brother and sister and yet, with my father it was comforting. I made the decision when my son was born that I was going to give him all the affection he wanted and loved all over him until around 12/13 when to even stand close to him in public was horrifying for him.
Around 16/17 he "came back around" and now I take my cues from him. He's cute because sometimes I tell him he has to give his mother a hug and he gets that "geez mom you're so embarrassing but I will do this to humor you and make this all stop" look and give me a hug, but he smiles when he walks away.
Honestly, I stopped for a moment when I thought that maybe I was doing something wrong... but many of you have solidified my resolve to keep kissing til he says no more. Thank you for that.
I really appreciate hearing everyone's thoughts on this...