Happy Days is cool because

#1 The Fonz's dog was called Spunky

#2 for the way the Fonz educated Richie and the gang about racism and how to tolerate Negroes.

#3 in Thailand Chachi means penis so Joan Loves Chachi meant something more in Bangkok.

#4 the Fonz always wore the same clothes all the time, a concept we can all appreciate.