This week we're looking at the science - and surprising sophistication - of the instincts we serve in the pursuit of pleasure. We're joined by science writer and journalist Zoe Cormier to talk about her book "Sex, Drugs and Rock n’ Roll: The Science of Hedonism and the Hedonism of Science." And we'll indulge our passion for nerdy gift giving with Simon Saval, co-founder of GeekWrapped.