in one of my classes we were discussing old customs and superstitions and my students told me the following:

if you whistle after dark it will attract ghosts.

you should never take a picture of three girls/women.

you shouldn't whistle because the ghosts will bring you bad luck and you'll have to go to a temple to get a charm so they'll leave you alone. you shouldn't take a picture of three girls because it looks like the chinese character for rape(this character is made up of three woman characters). most of my students said that no one really follows or believes these things anymore, but then another of my students spoke up and said a friend of hers had the ghost problem, and recently had to get a charm so it would leave him alone. i guess it's a good thing i'm not in the habit of whistling after dark.