It’s difficult to resist a book with a title like this. You might expect it to mention Viagra and related drugs - nope. As far as chemicals go, this is an MDMA (Ecstasy) love-in, with a whiff of other psychedelics, and a smidgeon of oxytocin thrown in. MDMA here is not just a chemical ─ it’s a trauma repair kit ─ helping foundering relationships by undoing trauma. We know this because MDMA has been used to treat PTSD, and if it helps relationships this must be what it’s doing. This, and the linkage between oxytocin and bonding between mothers and infants, frames these chemical interventions as meaningful.