Girls, if you often make or laugh at d*ck jokes, are they funny because they make men feel insecure? Is that the purpose of that type of humor?

Just trying to understand! My girlfriend loves that type of humor in comedy, but has trouble articulating what she finds funny about it.

Girls, if you often make or laugh at d*ck jokes, are they funny because they make men feel insecure? Is that the purpose of that type of humor?
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