For me it's randomly touching people. Not in a creepy way but stuff like playing with their hair or patting them on the head (if they aren't uncomfortbale with it of course). I don't know why I just do that to friends I really trust.
There's like a point of friendship we have to cross at which point my mind can say:
"Yeah, it's pestering time" and fuck around with their stuff. I also just touch their things like if I'm in their room I might just play around with their pillows and stuff. It's not meant to be rude or annoying, but it's really just how I show I trust them enough
I find that kinda weird so I wanna see if others have similar stuff
