These of from a GREAT website called Crazythoughts.com, I have taken some of the good ones and made a list for you!

• Do glow-in-the-dark objects stop glowing when somebody turns the lights on? 
• How do you know which armrest is yours in the movie theaters?
• Do Dutch people always split the bill?
• How come toy hippos are always blue, or purple, when real hippos are brown?
• Can someone have their head in the clouds and be down-to-earth at the same time?
• If a person suffered from amnesia and then was cured would they remember
  that they forgot?
• Why is it called butterfingers when there is no butter or fingers in it?
• If you died with braces on would they take them off?
• Why do mattresses have designs on them when they're always covered with sheets?
• If a singer sings their own song during a karaoke party, is it considered karaoke?
• Do cows have calf muscles?
• Why do dogs sniff other dogs bottoms to say hello, why dont they just bark in their face or something?
• If something "goes without saying," why do people still say it?
• Why is the 0 on a phone after 1 and not before 1?
• If someone crashes his or her car on purpose, why is it still a car accident?
• When you snap your fingers, does the sound occur when your middle finger releases from your thumb, or when your middle finger hits the palm of your hand? (I have been sitting here personaly trying to test this, and I so far have been un-successful at the result)
• Can't anybody who has a job go in the "employees only" doors at restaurants? Shouldnt they be more specific and say "employees of this place only"?
• If shampoo comes in so many colors, why is the lather on your head always
  white?
• How come, in the Mini Wheats commercials, Sweets has a Brooklyn accent and Wheats has an English accent? They're attached at the back, wouldn't they have been raised in the same place?
• If two identical twin brothers married identical twin sisters, would there kids be identical? (That one should be tested)
• Is it possible to scream at the bottom of your lungs?
• Is there anything easier done than said?
• Are you able to fart in heaven?