Puppies

 What do you call a puppy with a fever?

A hot dog.

Sewers

 Why do sewers make terrible runners?

They always have a stitch in their side.

Weather/Climate

 What's the difference between weather and climate?

You can't weather a tree, but you can climate.

Days of the Week

 What are the strongest days of the week?

Saturday and Sunday. The rest are weak-days.

Airplanes

 Why do airplanes make bad spouses?

They're always ready to take off.

Bogs

 What's a bog's favorite sweet treat?

Marsh-mallows.

Mike Tyson

 What is Mike Tyson's favorite bowl?

The punch bowl.