Well I am a teacher (in the UK) and when I told my class that in America a fanny is a perfectly acceptable work for bottom my students were UTTERLY DISGUSTED! (LMAO).
They said "why cant they call it what it is instead of THAT?" (clearly EVERYONE in the WORLD uses the same words as my 14 year old students)
And one student angrily told me NO Americans DONT call a bottom THAT, they call it a booty!! (clearly everyone in the USA fits into some rapping video stereotype held by a 14 year old girl in the UK.)
Naturally this educational conversation killed at least 15 minutes where I didnt have to bother explaining the finer points of trigonometry.