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.