Going to dinner at the home of a friend from a foreign country? Don’t want to cause a faux pas?

McCandless’s Etiquettrix is a guide to social dos and don’ts when visiting.

Green answers mean yes, go ahead. Brown ones are definite no nos. While grey ones are worth double-checking first, before putting your foot in it.

Feel free to burp in front of dinner hosts in China, but do not tap your chopsticks on the table.

And with Arab hosts, finger-licking is apparently fine – but do not make “yum-yum” noises in appreciation.