Real Name wrote:
Kevin,
Take a deep breath and hold it .............. now slowly let the air out,
slowly counting to 10. Do you feel better now.

Most handles have either leather, rubber or plastic to provide better grip.
They don't rust. I found over 100,000 hits recommending a light coat of oil
or WD40 as an effective way to protect tools.
I"m not Kevin, but:

That's odd, I've got many, many pairs of pliers that DON'T have
"leather, rubber, or plastic" on them. None of my four pairs of
vicegrips do, either. My 1/4, 3/8, and 1/2 inch drive ratchets? Nope.
Look at Craftsman's website. How many of their open end, combination,
or box wrenches have "leather, rubber, or plastic" on them? Now, you
claim that it's good for your tools to put oil or wd40 on them? Do you
realize that those hydrocarbon based products will actually degrade
plastic and rubber? Let's see your search results that recommend oiling
your tools. Working parts of those tools, fine. But not "coating" your
tools with oil, as you've suggested. I've got tools that were my uncles
when he was an aviation mechanic during WWII. They've never, ever been
coated with oil, and are in perfect shape. Again, you do know that a
liquid that is viscous enough to stay on the tool, will also hold sand
and dirt? Again, do you realize that dirt and sand are abrasive? Do you
realize what a few grains of sand will do to a nice pair of diagonal
cutters?