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bunny (n.)[bunny 词源字典]: 1680s, diminutive of Scottish dialectal bun, pet name for "rabbit," previously (1580s) for "squirrel," and also a term of endearment for a young attractive woman or child (c. 1600). Ultimately it could be from Scottish bun "tail of a hare" (1530s), or from French bon, or from a Scandinavian source. The Playboy Club hostess sense is from 1960. The Bunny Hug (1912), along with the foxtrot and the Wilson glide, were among the popular/scandalous dances of the ragtime era.[bunny etymology, bunny origin, 英语词源]
fox-trot (n.): also foxtrot, 1872, "a slow trot or jog trot, a pace with short steps," such as a fox's, especially of horses, from fox (n.) + trot (n.). As a type of popular dance to ragtime music, from late 1914, a fad in 1915. The early writing on the dance often seems unaware of the equestrian pace of the same name, and instead associated it with the turkey trot one-step dance that was popular a few years before.
As a variation of the one-step, as a legitimate successor to all the objectionable trots, the fox trot has attained a form which is in a fair way to become permanent. ... It has the charm of being an absolute fit for many of the most alluring transient tunes; and it can be danced, without self-consciousness, by hundreds of people who never pretended to be graceful or dancefully talented. [Maurice Mouvet, "Maurice's Art of Dancing," 1915]