Tongue Kissing

One day I was giving N a kiss when he asked me to give him a "tongue kiss". Surprised, I asked him what that was.

N: "You stick out your tongue and I stick out mine, and they touch. Tongue kiss"
Me: "Who taught you that?"
N: "N"
Me: "Your cousin N, or N at daycare?"
N: "N at daycare"
Me: "Oh. Does she only tongue kiss you, or does she tongue kiss everyone?"
N: "She tongue kisses everyone"

Update: I asked him about it again recently and he said she doesn't do that anymore. Then he said maybe it was his cousin not the girl at daycare.