British humour carries a strong element of satire aimed at the absurdity of everyday life. Common themes include sarcasm, tongue-in-cheek, banter, insults, self-deprecation, taboo subjects, puns, innuendo, wit, and the British class system. These are often accompanied by a deadpan delivery which is present throughout the British sense of humour. It may be used to bury emotions in a way that seems unkind in the eyes of other cultures. Jokes are told about everything and almost no subject is off-limits, though a lack of subtlety when discussing controversial issues is sometimes considered insensitive. Many British comedy series have become successful internationally, serving as a representation of British culture to overseas audiences. Themes Some themes (with examples) that underpinned late-20th-century British humour were: Innuendo Innuendo in British humour is evident in the literature as far back as Beowulf and Chaucer, and it is a prevalent theme in many British folk songs. Shakespeare often used innuendo in his comedies, but it is also often found in his other plays, as in Hamlet act 4 scene v: Young men will do't if they come to't / By Cock, they are to blame. Restoration comedy is notorious both for its innuendo and for its sexual explicitness, a quality encouraged by Charles II (1660–1685) personally and by the rakish aristocratic ethos of his court. In the Victorian era, Burlesque theatre combined sexuality and humour in its acts. In the late 19th century, magazines such as Punch began to be widely sold, and innuendo featured in its cartoons and articles. In the early 1930s, cartoon-style saucy postcards (such as those drawn by Donald McGill) became widespread, and at their peak 16 million saucy postcards were sold per year. They were often bawdy, with innuendo and double entendres, and featured stereotypical characters such as vicars, large ladies and put-upon husbands, in the same vein as the Carry On films. This style of comedy was common in music halls and in the comedy music of George Formby. Many comedians from music hall and wartime gang shows worked in radio after World War 2, and characters such as Julian and Sandy on Round the Horne used innuendo extensively. Innuendo also features heavily in many British films and TV series of the late 20th century. The Carry On series was based largely on smut and innuendo, and many of the sketches of The Two Ronnies are in a similar vein.