1. it's all about delivering the punch line. 2. if no one gets it then be quiet and wait for it - giving them time to laugh almost always works, while trying to explain the joke after saying it,...
http://funzblog.com/joke-maths
A little boy was doing his maths homework.
He said to himself, "Two plus five, the son of a b!tch is seven."
"Three plus six, the son of a b!tch is nine…"
His...