I have a friend, let’s call her Ellie, who has a diverting side hustle: she sells erotic images of herself online: nude, semi-nude, basically nude but in roller-skates and smoking Cohiba cigars. That kind of thing. She does this on a site many people will know: OnlyFans, which has become the site for women (and it is mainly young women) who want to make money from exhibiting themselves for the sexual arousal of online subscribers.