5. Sugar makes kids hyper

Numerous studies show sugar doesn’t affect behavior, but most parents don’t believe this. In one study, parents were told their kids had sugar and they were more likely to report problem behaviour — but in reality, the kids had consumed a sugar-free drink.

6. Cracking your knuckles will cause arthritis

Knuckle-crackers are no more likely to have arthritis than those who don’t make annoying popping sounds with their fingers.

7. Birth control pills don’t work as well with antibiotics

A review of the literature concluded that common antibiotics do not affect birth control pills. “It is much more important to take your birth control pill every day at the same time than to spend time worrying about your antibiotics,” the authors write.

8. Singles have better sex lives than married people

You may think your bachelor friends are having all the fun, but single people also go through a lot of dry spells when they aren’t dating anyone. The result — married people typically have more sex in a given year than single people.

9. It’s okay to double dip in the chip dip

In one study, scientists took a bite of cracker and then dipped it into salsa, cheese dip, chocolate syrup and water. They did the same test with

a fresh, unbitten cracker. Then they measured bacteria in the dips and the volunteers’ mouths. On average, three to six double dips transferred about 10,000 bacteria from the eater’s mouth to the dip. And each cracker picked up between one and two grams of dip. Salsa picked up the most germs from double dipping.

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