The principality of Monaco is oh, so proper. Not like its rowdy Riviera neighbors Cannes and Saint-Tropez, where topless beaches abound. Oh, no. Monaco is tidy, very wealthy and very buttoned-up. Witness this warning to tourists. At first I thought it was banning men from walking around in their underwear, a regulation I’d be honor-bound to protest. Instead, unless you’re at the beach, they don’t want no bare-chested men, no bathing suits, even no walking barefoot. Pardonnez-moi? Do you know the way to Saint-Tropez?