Tongue-in -cheek sentences

Source
On April 12, Kevin MacKenzie emails the MsgGroup a suggestion of adding some emotion back into the dry text medium of email, such as -) for indicating a sentence was tongue-in-cheek. Though flamed by many at the time, emoticons became widely used after Scott Fahlman suggested the use of :-) and :-( in a CMU BBS on 19 September 1982