When Psyche Loui first heard Rachmaninov's Piano Concert No. 2 on the radio as a college student, she still remembers the chill that went down her spine, the fluttering in her stomach and the racing heart. Now an assistant professor of psychology and neuroscience and behavior at Wesleyan, Loui studies this phenomenon--which she refers to as "frissons" or "skin orgasms"--in her lab. She recently co-authored a paper with Luke Harrison '14 in Frontiers in Psychology reviewing the evidence and theories in this area, and spoke to the BBC about their findings. Loui, also an accomplished pianist and violinist, points out that the sensations…