A guest gets out of your car, closes the door gently and it clicks only once. To make sure it closes completely. Take it off instead. Neckties inside your shirt get sweaty and grundgy very quickly.
Neckties are very difficult to clean.
You are reading a magazine and a postcard falls out. You should not put it back in the magazine. Put it on a table or a chair or a shelf instead. Actually if you leave it where it fell, probably nobody will notice. Teach those companies that if they don't want their advertising cards thrown away they should fasten them securely inside the magazine.