Robert Provine, professor of psychology, is a contributor to the recent “Body Issue” of New Scientist magazine. Provine’s piece, “It’s Only Natural,” discusses the curious behaviors of our bodies. “It’s your body, and you like to think you’ve got it under control. But underneath the calm exterior lurk unruly instincts and urges that are struggling to escape, putting you at risk of embarrassment or ridicule. These disreputable behaviours – the likes of the fart, hiccup, itch and yawn – are familiar to us all, yet they are also decidedly curious. Although they have been the source of folklore and puzzlement since antiquity, …