I have never really seen any detailed discussion by TeX users on the subject of Computer Modern Funny, despite how strange it is. Personally, I find that even with its eccentricities, CM Funny and CM Funny Italic nicely mimick a handwriting-like style:
Nevertheless, I do not encounter many other TeX users who incorporate CM Funny into their documents, nor is it something that I have so far found in any of Knuth's books. (I suspect that CM Funny may be Knuth's attempt to illustrate the power of METAFONT to its greatest extent, although I do not have a copy of the METAFONTbook, so I am not completely certain.) Therefore, I would like to ask, what was Knuth's purpose of implementing Computer Modern Funny, and what is its purpose, if any, for the typical TeX user?