Sadly, not the city in the South of France, but the use of the word:
I'll make a nice cup of tea/cake
Have yourself a nice sit down
I was wearing a nice blouse
No-one is going to say "i'll make you a horrid cup of tea, or admit to wearing an ugly top, so why use it?
Habit?
Just something we say without even registering that we say it?
Answers on a (nice!) postcard please!