…and more in this 3-minute TED talk by Derek Sivers, sent in by AJ S.   As AJ points out, the examples show that “…just because something is different doesn’t mean it is not logical in context.”

Lisa Wade, PhD is an Associate Professor at Tulane University. She is the author of American Hookup, a book about college sexual culture; a textbook about gender; and a forthcoming introductory text: Terrible Magnificent Sociology. You can follow her on Twitter and Instagram.