Napkin stains left behind when we leave the restaurant can be washed out without any problem using powder or chlorine-based detergents. Stains containing fat, such as those from steak, tend to persist in fabric. This impedes the stains from coming out.

The same principle applies for using dogs to catch criminals. You have them sniff the clothes or anything else that was handled by the fugitive. Detergents, like clothing, put water to the 'scent' of the stain. The detergent and the water end up nibbling away at the stain. So the stain easily washes off when the water is rinsed away.

It's not hard to remove fatty stains. All you have to do is immerse the article of clothing in warm water with detergent. But read the laundry instruction tag at the outset to ensure that the fabric won't shrink if you immerse it in warm water.

There are some laundry detergents that fight protein enzymes. These are largely for destroying microbes so that the clothing will come out smelling like it was just made yesterday. These days, you can also use microwaves for getting rid of stains and fabric odors.

Napkin stains are seen at once. What many of us don't observe is red wine, the other substance that causes stains.

Red wine is just like oil when you're comparing hearts and car engines. The French believe this so much that they drink red wine with everything. They seem to be the only people in the world who eat a great deal of fat without it affecting their heart, owing to the massive amounts of red wine they consume.

Consuming inordinate amounts of wine will not only spoil your liver, but also destroy your teeth with lasting stains. This is because of tannins found in red wine (and coffee). These stains occur on all teeth, no matter what country we hail from.

Alas, when we perceive that we have tooth stains, most all of our teeth are affected. Don't get all hot and bothered. We have Westland dental veneers here in my office that will handle even the worst tooth stains. Plus, you can drink a fair amount of red wine without being bothered about the idea of your teeth becoming discolored.