What's with this kid and the tongue?

Baxter was over visiting with Laddie the other day. They were romping and playing and carrying on for a while.
Then Laddie did his usual Off with you, Baxter, I am sitting here chewing on something and have grown tired of you act.
I can't say as I blame him. Baxter is an 8 month old lunatic puppy and Laddie is almost 9 years old. That's what, retirement age in dog years?
So Baxter decided to see what we were up to on the deck.
What we were up to was hanging out and eating a graham cracker with cream cheese on it.

One day this child will learn that licking dogs (or trying to) is gross, right?