There was a sick man. He had headaches and stomach aches and sometimes even vomitted. And at the same time his wife was six months pregnant. One day he went to the doctor, and explained his problem. After takin observations on the man the doctor asked him to bring his urine the next day.
That night, when the man was in bed, he remembered he was supposed to take his urine to be tested the next day, so he got out of bed, and urinated in a can/tin, THAt always staid under the bed.
That very night when he went back to sleep, his wife also woke up, as she felt like urinating. She remembered there's a tin they always placed under the bed, so she took it and poured her husband's urine out the window, so she could use it.

NEXT DAY:
the man took the tin of urine to the hospital.

AFTER SOME TIME:
MAN: SO please doctor, tell me what i'm suffering from?? i've been sick for long.
Doctor: *saying unwantingly*
YOU ARE SIX MONTHS PREGNANT.