The medial s was subject to confusion with the minuscule f, sometimes even having an f-like nub appended to its middle. The practice later died out in Roman and Italic faces by the end of the 19th century. It survived longer in the German Fraktur; the modern German letter ß (ess-tsett) is a ligature representing ſs, a fact more obvious in some typefaces than in others.
The medial s is represented in Unicode by the hexadecimal value 17F, and may be represented in HTML as ſ
.
The confusion between the medial s and f has been the subject of some intentional humour, much of it involving phrases like "sucking pig", and forms the basis of Benny Hill's song "Fad-Eyed Fal" (i.e., Sad-Eyed Sal)