I kissed both of my parents and siblings on their lips until I was about 9? I think. All of my siblings kiss their toddler children on the lips right now.
There was nothing sexual about it. Of course Tom Brady's response to just getting a peck is weird lol.
That is all my kisses with my parents/siblings were, pecks.
If I had a kid, which I don't plan to, I would not kiss them on the lips in today's culture. Too many people assume the worst when it comes to men and children. Plus as a bisexual man I have stereotypes pertaining to that too. It is unfortunate because pecks on the lips are as affectionate/non-sexual as hugs from my perspective.