from previous-

-an american  doctor   doing  his  medical  research  on  tears   got  samples  from one  hundred  patients  on payment  to  experiment, he  found  onion tears  are  chemically  different  from real  emotional  tears, because  they  are  saturated  with  emotions  released  in blood  stream  under  great  mental pressure  which  when  roll  down  from their  flooded  eyes  give  them  relief as  a  result  they  feel  lighter