When asking someone for a favour it is considered rude to omit "please" in English. This seems not to be the case in German. In a shop or a restaurant I can frequently hear: "Was bekommen Sie?" - ...
I learned that I should not entitle a female hairdresser "Friseuse" as this may be considered as rude. Duden lists "Friseuse" as both, colloquial and antiquated, and recommends the usage of the ...