Can I make the obvious point that there are significant cultural and even personal variations in these things. Exhibit A: If I lean back and cross my arms whi

Can I make the obvious point that there are significant cultural and even personal variations in these things. Exhibit A: If I lean back and cross my arms while you are talking to me, this generally means "you have said something so interesting I need to sit back, give you space to finish your point, and think carefully about you said". Not, as the dude implies, I don't like you and I feel uncomfortable.