I believe people can like each other and want to spend time with each other . . . but all that stuff about being together forever? I don’t know, it feels a bit like a work of fiction, a lie we tell ourselves to make life more palatable. A way of explaining the kind of temporary chemical craziness that comes over people when they get together. It’s just molecules breaking apart and forming new bonds, it’s hormones playing tricks on us to fool us into keeping the species alive, and sooner or later it wears off.’