When he bend down towards me I very gently stroked his neck and " pushed " on it in a downward manner . Before he realized what he was doing he sank to his knees in front of me and now was indeed shorter then me . I leaned forward , kissed his forehead like a matron would do a favored student and repeated : " I am taller then that ! " At that moment emotions ran over his face that I know seemed to surprise him .

Question: Why did I very gently stroke his neck ?
Answer: Because he was indeed shorter then me .Because I " pushed " on it .Because he sank to his knees in front of me .None of the above choices .