I'm from Buryatia, Russia. In the past, Buryats sometimes gave children names that meant bad qualities. For example, Archinsha - “drunk”, Borsoy - homely. The girl could be called Muu Hubuuun - "Bad Boy." There was a high child mortality rate and people believed that if you call a child like this, then evil spirits will not pay attention to him and will not take him away.

Male friends holding hands.

Eating rice is particularly a must for most Indonesians. It would be as if you've not eaten yet if you didn't eat rice. 

My mother was willing to pay 14 US$ for a plate of white rice when she was in New York City once. She said she couldn't take it anymore without eating rice for a couple of days.

Eating with a bare hand is something else that Indonesians like to do. Especially when eating a specific traditional food. It needs a special technique in order to scoop the food into your mouth without dropping it.

My friends and I bought white rice and brought it to KFC near our college in China. Everybody stared at us, the employee approached us and offered us disposible gloves to use. We didn't bother to use them.

(Edited for grammar check)

Here in Serbia, sometimes for example, when we are talking amongst each other and we mention something bad and we don't want that to happen to us, we say "pu, pu, pomeri se s mesta" and we move an inch from the current place we're sitting in or standing in, for good luck. Sometimes we knock on wood too, but that is common for other cultures as well, i guess.

In the United States, many waitresses in diners and female shop clerks have a habit of calling customers "hon" (honey) or "sweetheart" or other such terms of endearment. This custom usually involves a woman who is older than the customer, but not strictly so. It's most often seen in working class places. This custom is practiced less in fancy restaurants or department stores.