The Funny Guy

So what kind of stereotype is the 'funny guy'? They dont normally follow any fashion but are usually quirky characters. The funny guy I'm talking about isnt a hyperactive retard with crazy hair and way to many drugs, but someone with a dry sense of humour, and very witty.

Not speaking for everyone, but I'm basically describing Ricky Gervais (not Russel Brand humour, he gets a bit excited), he doesnt have to try and be funny...naturally he cracks me up.

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Anyway, the well known 'funny guy' in our society is normally a girls 'mate', not their boyfriend. Why is this? Are they too 'chummy' and not flirty enough? Are they not taken seriously?
My next date sets me this exact challenge...