PUN
the usually humorous use of a word in such a way as to suggest two or more of its meanings or the meaning of another word similar in sound.
A pun is a figure of speech which consists of a deliberate confusion of similar words or phrases for rhetorical effect, whether humorous or serious. A pun can rely on the assumed equivalency of multiple similar words (homonymy), of different shades of meaning of one word (polysemy), or of a literal meaning with a metaphor.
I like this pun: Marathon runners with bad footwear suffer the agony of defeat
Joke about health:
The smoke detector industry is covering up research showing more people are injured every year falling from ladders and stepstools while trying to replace smoke detector batteries than are injured in house fires
I have found a lot of sites about happiness but most of them are jokes, quotes, sayings