What would you do if you found the trousers door open in the street? On the contrary, what would you do if you saw someone else in this situation?

It is normal to pull it up quietly without knowing it, and you should know it in your heart! Because everyone may have a similar situation (for example, sometimes it may be their own carelessness or the quality of the pants themselves).

If you see such a person, you can give him some sincere hints to get it done as soon as possible, but try to avoid embarrassing the parties, or remind him quietly at an appropriate time (when there are few people, in a quiet place, etc.). ).