You know, right? You want them nearly closed but they keep opening. You want them open but they keep closing. So smart people invented a small device to hold the door open, closed or to preventing it from opening too widely or closing too narrowly. Little cute piece of home decoration, you can match it with a draught stopper or just get it as is. Take a look at some models I make. They are filled with rice to give them sufficient weight to keep a door still.