The HONK HONK gesture is ingrained into our genetic memory as men, were as women must be taught EVERYTHING by men if time travel porn plot logic serves my memory correct.
I'm pretty sure most of this aired on The Movie Channel and Cinemax respectively.
YOU CAN ONLY MISPRONOUNCE IT BY READING IT, NOT BY HEARING IT! YOU HAVE RUINED THE JOKE!
Actually when coupled with the later scene of her reading "kiss", this suggests she is the world's smartest cavewomen, able to quickly absorb complex writing systems, new languages, and new scientific concepts.