Dutch blockchain company LegalThings announced in a press release on Wednesday that it is developing an app, LegalFling, which in theory could allow about-to-bone partners to log what they are and are not OK with before they bone. The company notes that you can mark your do's and don'ts "with the swipe of a finger". This is quite literally a feature in the most recent season of Black Mirror, where two matched up partners agree to sexual consent with a simple swipe on their devices.