By the way, here's some advice your mother got right -- eat your carrots. Recent studies confirm that beta carotene, an anti-oxidant found in the orange, yellow and red fruits and vegetables, is very healthy for eyes.
What do male underwear, laptop computers and hot tubs all have in common? According to contemporary urban legend, they all lower fertility and can have cause serious problems for couples trying to have a child.
"The testicles are outside the body because they need to be cooler. Anything that increases the temperature of the scrotum can adversely affect sperm production," said Dr. Harry Fisch, who treats male fertility and has written a book, "The Male Biological Clock."
He said with briefs, there's no definitive research, so most likely it's a myth.
The hot tub can be more damaging to fertility. Fisch said if the water increases the body temperature to 104 degrees there can be a dramatic effect on sperm count. "As a matter of fact, sperm counts decline for the next two months. And it may take four to six months for the sperm counts to recover," said Fish.
Latops can kick out a heat of 104 degrees after an hour of use. Dr. Yefim Sheynkin of the State University of New York recently published a study on laptops that found they could cause permanent fertility problems when used directly for extended periods of time on the lap.
Chocolate is typically described as both a sinful pleasure and a fattening food. But recent studies show there are ways in which the sweet treat can be good for you.
Cocoa beans are rich in compounds called flavonols that produce specific health benefits.
"Chocolate can have very beneficial effects for your heart," said Katherine Tallmadge, a spokeswoman for the American Dietetic Association who has also written the book "Diet Simple."
She described the health benefits of chocolate as "relaxing blood vessels. Maybe reducing blood pressure and reducing blood clotting, which is an aspirin-like effect, as well as reducing inflammation, which is an emerging risk factor in heart disease," said Tallmadge.
Flavonols, also found in red wine, green tea, apples and onions, are very concentrated in the cocoa bean. But they're generally processed out of the chocolate because of their bitter taste.
Until it becomes common for manufacturers to measure and list their flavonol content, there are some basic tips if you're looking for the healthiest kind of chocolate. Drinking unsweetened cocoa is one way to start.
"You want the product that has as little processing as possible," said Tallmadge. "Look for the darkest chocolate you can find and try to find a product that has a high level of cocoa and a low level of calories," said Tallmadge.
The bad news: Because it is high in sugar and fat, chocolate is not a health food. If you're really into its benefits, Tallmadge said a one-ounce serving of dark chocolate is enough.
For the No. 1 myth, John Stossel took a look at revenge:
In the movies, revenge is applauded, and I love those moments of revenge -- the satisfaction of watching the bad guy get his just punishment. But if revenge is sweet, Stanford psychologist Fred Luskin say, forgiveness is much sweeter.
There's a lot of research pointing to the negative effects of hostility.