Humor is always based on a modicum of truth. Have you ever heard a joke about a father-in-law?
There's so much pollution in the air now that if it weren't for our lungs there'd be no place to put it all.
The louder he talked of his honor, the faster we counted our spoons.
The dead might as well try to speak to the living as the old to the young.
The great art of giving consists in this: the gift should cost very little and yet be greatly coveted, so that it may be the more highly appreciated.
The only difference between a rut and a grave... is in their dimensions.
Typos are very important to all written form. It gives the reader something to look for so they aren't distracted by the total lack of content in your writing.