Who's Pig

Jenny and John went to the Market to buy some Pigs.
Jenny bought one and John bought one, but they ended up having
not enough money for two pig sties, so they bought only one, and
decided to put both their Pigs in there.


But then Jenny said,
how will we tell them apart? So, John cut his Pig's ear off.
During the night, John's Pig was eating off the ear of Jenny's
Pig, so John cut off the other ear of his Pig. And during that
night, John's Pig was eating off the other ear of Jenny's Pig.


In the morining John and Jenny couldn't tell them apart, so
Jenny said "Look, i'll just have the white Pig, and you take the
Black one!"