Not all Facebook groups are forums for insurrection, anti-vaccine propaganda and rude remarks about Bill Gates. Some are just places where people talk about their dads. ‘Middle Class “Your Dad” Talk’ is a group where some 23,000 members share observations and witticisms that all follow the same format: ‘your dad is extremely specific about how the dishwasher is loaded’; ‘your dad judges others’ success by how big their kitchen island is’; ‘your dad was building up the courage to confront the postman about leaving the garden gate open until he saw he had a tattoo on his arm’.