This is not an AIBU and is meant to be lighthearted. I am just back from holiday and only took one pair of pyjamas. I asked my DH if he had a spare t-shirt I could wear and he gave me one telling me it made him look a bit "Kenneth". I got the reference straight away. Anyone else hazard a guess as to what he meant? Also what are your family in-jokes that no-one else would understand? My children called their tonsils their rileys for many years and I've no idea why.