Passers-by usually stop by the side wall of Mr Obi's house to urinate,and the smell was so bad.Displeased by this ill act at has lingered on for so long now, he wrote the usual public notice, DO NOT URINATE HERE BY ORDER!
They urinate even more.
Then he got a brilliant idea, he rephrased the notice to read;
PLEASE HELP ME URINATE HERE, A NATIVE DOCTOR NEEDS SOME SAND SOAKED WITH HUMAN URINE.
That day his ordeal ended.