After sex, my GF and I shared a cigarette. When she suddenly started coughing, I said: "Didn't I tell you smoking is no good for a 5 year old?"
How would you rate the sense of humor of people who are not able to understand your funny "joke"? It leans on being pedophila-like.
They are too stupid to even have a sense of humor in the first place.
I think a sense of humor should be lighter than that. Take care of your mind and make sure your thoughts are pure. You could steer yourself into some deep trouble with the law if not otherwise.