There were two security guards who worked on opposite shifts, but looked after the same building.
Over a period of a year, the night shift security guard noticed that his opposite was putting on weight.
So one evening at shift change, the night shift security guard says to the day shift security guard "Hey buddy, you aint half gettin fat".
To which the day shift guard replies "Yeah, that's because every time I s**... your wife she gives me a chocolate biscuit".
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