Well, chiropodists like jokes. But opticians like them .
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because he didn't C#
Ph.P.
A: An Canadian not only has a sense of humour but can also spell it.
The punch line.
Because he doesn't like looking down on the unemployed. First to ever post this joke here, yay!
Because they both "practice" their professions.
They both work on crowded platforms.
Wong Wei