My principal at graduation spent a solid 10 minutes talking about how to make it clear with your body language if you want a hug or handshake when you get your diploma, until one girl went for a hug then immediately changed it to a middle finger, body language is great
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RT @mechanical_monk
here's a social norm that would avoid any ambiguity, awkwardness, or need to ask around method of greeting (hug, handshake, kiss, etc):

each…
https://twitter.com/mechanical_monk/status/1407080511944724489