[Discussion] Any weird trade rituals that you guys do?

I've always been curious if there's something you do every single trade that's a bit bizarre.

I have a buddy who every time he trades he throws in a painted topper in every trade that he makes.

Myself, I typically ask whoever I trade with if they'd like to play a game after (if they stay long enough for me to ask)

Do any of you guys do similar stuff?