In France, tips are not mandatory, it’s already included in the retail price (with the VAT too). But at a Caffé or a restaurant, it’s common to let a tip.
There are few books “banned” in France. They are not “banned” per-say, they only are forbidden to be printed again, but they can be read and sold for the few copies available. They mostly are true fascist and Holocaust denier books.
My doggo is doing her “belly dance” when she’s over a garbage “juice”. The fragrance maybe…