I was sitting between mother and daughter on the sofa, and we were having a ‘wee night’ as Glaswegians put it. Having a wee night roughly means ‘celebrating’. Yesterday the daughter finished the final exam of her English degree. On the low table in front of us were three gin and tonics, two packets of fags, a souvenir ashtray from Dracula’s castle in Transylvania, a packet of transparent French cigarette papers, a plastic syringe with hash oil rammed up one end, a disposable lighter, a portable Bluetooth speaker, and an open laptop.