Irony and eschatology
Not too many years ago, London Transport ran an advertising campaign featuring various famous historical figures to promote how easy it is to get around the capital by tube. One of the posters had Henry VIII asking for 'a return to the Tower' then adding: 'and a single for the wife'!
Dr John Benton
Something is said or done which, though on the surface seems totally straightforward, those 'in the know' recognise as highly and (perhaps humorously) significant. That is what we call irony.