Well, chiropodists like jokes. But opticians like them .
Three. One to post it, another to post a better punchline in the comment section, and another to repost it with the new punchline.
H Edit: I don't like explaining jokes but since the first guy didn't get I might as well: When pronounced in a French accent it sounds like ash.
A: An Canadian not only has a sense of humour but can also spell it.
One. We are efficient and don't like humour.
Proctology.
Driver
Wong Wei
because he didn't C#