When we talk about libido, it?s often described as an impulse linked to our hormones. But how does it really work? Lili meets with Normand Voyer, a professor of organic chemistry at Laval University, to concoct a love potion. What is the connection between our thoughts and what happens physically when it comes to sex and desire? A psychotherapist guides us towards the answer to this question, as Lily gently explores the world of sex addicts, asexuals, and the polyamorous.