Is kissing family members on the lips wrong?

I’ve been having debates with people on this. What’s your opinion?

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Some family's are weirdly close and it doesn't matter. I know someone is going to write "if they slip you the tongue it's wrong"...but I'll avoid that. My other joke is "not if it's Joe Biden's family!" (Sorry).
In this day and age, it's just a little odd...but to each his own!