02. Whistling at night is a bit taboo. This should be a rule handed down from the older generation. In short, don't whistle at night. Because it is said that whistling at night will attract ghosts and gods, although this is only superstition, it has been handed down. Whistling at night is a bit scary, because it is a bit scary. Don't make any strange noises at night. Whistling is really creepy. Anyway, I really don't like such behavior.
This kind of behavior has a feeling of grandstanding. If you hear a whistle on the road, there is a 50-50 chance that person wants to get your attention. The more you pay attention to him, the more proud he becomes. On the contrary, if you turn a blind eye to this kind of behavior, it will also dampen his enthusiasm. So in the face of such a situation, you don't have to express your disgust to the other party, just ignore it. Don't make them proud!
Actually, I don't think it's a problem to whistle in jokes. But in some taboo scenes and times, it is better to pay attention to your behavior and not whistle casually.