Can we finish the month on silly gestures that mean something to someone?

I’m talking the ones you (generally- exception made for characters who act like this all the time without fail) don’t do to strangers because it’s not considered polite, but with that one person they get it and why you do it. Like a human to human nose boop. Or when you hold hands and you start swinging your hands back and forth. Maybe even a little fancy dance move spin out of nowhere. Those moments.

Now, can you tell me some of your favorites? What else do you consider a silly tender gesture?