Ok here's the worst.
The walk from your room to the hospital's main lobby going home with a newborn.
I literally have to clip the two ends of my mouth to my ears.
Non-stop smiling. To all the passersby. "wow!!! Congratulations!!! She's soooooo cute!!!
Is this your first one?"
Me: (smiling embarrassed) "thanks, its my second".
Walking another few feet and: "wow!!! Congratulations!!! She's soooooo cute!!!
Is this your first one?"
And again, and again.
And then: again