ALL OF YOUR CHILDISH BELIEFS, 100% CONFIRMED BY SCIENCE

...except for that whole "the earth is flat" thing: http://goo.gl/KiG6YS
  1. Your parents had a favorite kid.
    Studies have shown that 65 percent of mothers have a favorite child (usually the oldest boy), while 70 percent of fathers claim to have a favorite (usually the youngest girl). And seeing as how admitting to loving one of your children more than the others isn't something people traditionally take pride in, those numbers are most likely underreported.
  2. Medicine and veggies are gross (at least, when you're young).
    According to science, you weren't being whiny. Well, not just being whiny, anyway. Some things simply taste worse to kids. See, kids are born with mouths like an audience at Bonnaroo -- they're positively filthy with taste buds, each one scrambling to get a better view of the next act (and also to lick it). By the time we're adults, however, around two-thirds of those taste buds have died off. That's also why most kids don't love bitter tastes (more taste buds = bitterness overload) but grow to.
  3. Your body really makes room for dessert.
    Your stomach is not a rigid organ. It expands and contracts, and it turns out that glucose causes the muscles in the wall of your stomach to relax. Also humans have something called "sensory specific satiety" planted deep within our evolutionary makeup, tied to the fact that humans are designed to be omnivores. When we eat too much of one thing, a switch in our brain flips to tell us we've had enough. Offer it a different thing, like dessert, and it switches back off.
  4. Reading/watching the same things over and over again is good for you.
    As much as repeated viewings of the Alvin And The Chipmunks franchise make us wish otherwise, science says this is a valuable exercise for young children. Repeating an experience -- be it revisiting a favorite vacation spot, rewatching a favorite TV episode, or rereading a favorite book -- is known as "hedonic volitional reconsumption," which is an asshole way of saying that we repeat enjoyable experiences in order to actively search for a deeper, more emotional meaning.
  5. Sucking on an injury helps it heal.
    Scientists created artificial wounds in two separate Petri dishes, and then treated each with a different solution. One was bathed in human saliva, the other in a plain isotonic fluid. Less than a day later, the slobbery sample had almost completely mended its wound, while the control sample had taken a year off to backpack through Europe to see if "healing" was what it truly wanted to do.