No offense?
Depends on the context of the joke and who wants play along. If you involve everyone, that's pretty serious. Not everyone has the same sense of humor and the people who want to act like kids can apply itching powder to each other while all the serious minded people can focus on what they need to. It's a very simple concept.
H. Hammer...you seem like a good guy but we probably wouldn't get along dude
Cordially yours,
冠木侍 (KS)
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"Jiu mo gwai gwaai faai dei zau" (妖魔鬼怪快哋走) -- The venerable Uncle Chan
"A fool with a sword is more dangerous than any weapon..."
“If your actions inspire others to dream more, learn more, do more and become more, you are a leader.”--John Quincy Adams
"If you have an unconquerable calmness, you can overcome the enemy without force" -Bushi Matsumura