That's Disgusting

Today is John's birthday. Tucker and I woke him up this morning with "Happy Birthday" hug from Tucker and a kiss from me. I guess Tucker didn't really like me kissing John because once we started walking downstairs, he gave me a little nudge and started whispering to me. "Mama, did you just kiss daddy?" I replied that I did. He gave another strange look then whispered, "on the lips?" Once again, I replied that I did. Tucker then said, "Just because it was his birthday, right?" Once again I nodded. Thinking that the conversation was over, Tucker then exclaims, "That's disgusting!"